Note: This story was dynamically reformatted for online reading convenience.
 
 Keywords: MF, exhib
   Author's Note: This story is fictional.  The setting and characters are
based on actual places and people, but the interactions described are
entirely made up.  Chapters 1 & 2 are entitled "Grace".  After that,
chapters alternate between Grace (Mf) and Karen (MF).
   Chapter 3: Karen
   I didn't want to follow her back to the lab, so I took the stairs all
the way down to the first floor.  I headed into the cafeteria to grab a cup
of coffee to relax.  I got my coffee and went to sit by the windows.  I
started to process what had just happened and what to do next when somebody
slipped into the chair across the table from me.
   "Oh...  hi Karen."
   Karen was a new grad student in our lab.  She was friendly and smart,
and a tight little package at maybe 5'3".  Her standard uniform was a tank
top, short shorts and running shoes.  Her lab bench was across from mine,
so I would often look up while doing an experiment and see her across the
bench from me.  When she leaned forward I would usually try to catch a
glimpse down her shirt, but she always wore a sports bra, so I never saw
anything.  She caught me in the act a few times, and would either pretend
not to notice or smile at me and move along.  We got along quite well and
these incidents didn't seem to affect that.
   "Hey," she said.  She didn't seem to notice that I was surprised by her
sudden appearance.  She seemed distracted herself.
   "How's things?" I asked.  She sighed and rolled her eyes.  "I just broke
up with Jake." Jake was her most recent boyfriend, her third, I think,
since she joined the lab about a year ago.  "Oh, I'm sorry to hear that. 
What happened?" "I don't really feel like talking about it," she said. 
"How's your girlfriend?" I found it amusing that she was unable or
uninterested in learning my girlfriend's name after a year.  They'd even
met once.  My girlfriend had dismissed Karen as a tart based on her dress,
but I had to work with her every day, and she was perfectly nice.  I
certainly didn't mind gazing at her tight ass in those tiny shorts.
   "Yeah, she's fine.  We're going camping this weekend."
   "That's nice.  You two have such a stable relationship."
   "Yeah."
   "Thanks for helping out with Grace," she said.  "I just don't have the
patience for her."
   "She can be annoying," I admitted.  "But I was thinking about getting
involved in one of those high school outreach programs, so this is good
practice."
   "You're such a do-gooder," she said with a wry smile.
   If only you knew, I thought.  We chatted for a while about other mundane
stuff.
   The next morning while I was setting up an experiment, Karen came in and
began arranging equipment on her bench, opposite me.  There was some shared
equipment in the middle of the workspace.  If someone wanted to put a test
tube in the mini-centrifuge, for example, they would have to lean forward
to reach it.  Almost every time Karen did this, my penis hijacked my brain
and I would steal a peek, to no avail.  I knew she wore sports bras but my
penis just didn't learn.  Today though, I glanced up and -wow!- I could see
everything!  Under today's tank top, Karen was wearing an otherwise
unremarkable bra.  But because her breasts were so small, they didn't have
much to cup, so when she leaned forward, they hung an inch away from her
chest.  I could see the entire tops of her small mounds, A cups probably,
and her puffy nipples in profile.  It was only for a moment, and she moved
on to other tasks across the bench, busily arranging her samples and
equipment as though nothing was out of the ordinary.  She didn't look
across at me, she just minded her own business.  I realized I was staring
at her in disbelief; I peeled my eyes away and stared down at my ice bucket
instead, as if the samples in front of me were confusing.  I tried to focus
on my work as best I could.  Obviously, I was not progressing very quickly,
but that was okay because the longer I had a reason to sit at my bench, the
longer I could observe Karen.  I tried to be discreet about peeking at her,
but I'm not sure it was working.  Either way, she paid no attention to me.
After she seemed to have everything arranged, she pulled out her notebook,
set it in front of her and leaned over to write in it.  Why wasn't she
doing this at her desk?  I looked over and was treated to the same view of
her puffy nipples that I had gotten before, but this time it was prolonged.
I looked around the room; I didn't want anybody to catch me looking down
Karen's shirt.  There were at least three other people in the lab, occupied
with their own business.  The tech was occupying Grace's attention.  I
looked back, imagining sucking those tits into my mouth.  I bet those big
areolas would be soft on my tongue.  Karen looked up -Shit!- I immediately
looked up and grabbed a bottle off an overhead shelf.
   "Hey, quick question," she said nonchalantly.  "I'm about to set up this
enzyme activity assay.  How much radioactivity do you usually use?"
   "Oh...  um..." I tried to collect my thoughts.  She was still leaned
forward over her notebook, her tits still perfectly visible, but she was
looking at me and I was struggling to maintain eye contact and not let my
gaze drift downward.
   "I usually use a solution that's one percent radioactive.  That should
give you a good signal when you scan it," I told her.
   "Okay, thanks," she said and looked back down to jot it in her notes.
   After that close call, my heart was pounding.  I was almost sure she
knew I was looking - she had to - but I don't know what she would have done
if I had not looked away quickly.  What would she have done if she looked
up and I was still staring at her tits?  I had already been overly bold
with Grace and I didn't want to push my luck.  I left my experiment on ice
for an hour and returned to it when Karen moved on to other tasks.
   That afternoon, Karen asked if I wanted to grab a cup of coffee in the
cafeteria with her.  This was unprecedented except for yesterday's
coincidental meeting.  Downstairs, coffees in hand, we had a pleasant chat.
From a more civilized perspective, her bra/shirt combination was not
especially inappropriate.  I turned out her experiment hadn't worked.  She
would have to repeat it tomorrow and wanted advice so we talked about that
for a while.
   The next day Karen came in quite late.  I was disappointed to notice
that she was wearing a sports bra as usual.  She got started on her repeat
experiment as she had yesterday.  Grace came over at some point and asked
if I could review some data with her.  I told her I needed to catch up on
my own data in preparation for my meeting with the boss.  This was true. 
If I didn't do some work without distraction, my advisor was going to be
upset that I hadn't accomplished anything lately.  So as not to disappoint
her too much, I told her Monday would be much better and if she could wait
until then, I would have plenty of time, and gave her a knowing look.  She
seemed okay with this.
   The day wore on and I was starting to feel like I was back to business
as usual.  The combination of Grace, Karen and my efforts to go undetected
was exhausting.  Around six, people started to head home.  Because I was
being extra-productive, I decided to power ahead with my work since I
wouldn't have time this weekend on my camping trip.  It was Thursday and
staying late was not unusual for me a couple days a week.  By seven, I was
alone in the lab, but Karen's stuff was still there, so she must be around
somewhere.  She often worked out in the campus gym in the afternoon.  She
must have been delayed because she got in late today.  A few minutes later,
she came in came in, hair wet from the gym shower, wearing just a sports
bra and tiny running shorts.  She smiled at me, was that a sly look on her
face?, grabbed a bag of clothes stashed under her desk and walked back out
of the lab.  She came back a few minutes later, quickly threw on a lab coat
over her clothes and got to work.
   "You're here late," Karen commented.
   "Yeah.  I'm getting work done, so I thought it was better to keep it up
than to go home where I'll be distracted," I responded.
   "Lucky for me," she said.  "I might need some more troubleshooting
advice if this experiment fails again."
   Karen worked at her bench for another thirty minutes or so.  From my
desk next to my bench, I had a decent view of her, but she was chastely
covered by the lab coat.  When she was done with the radioactive portion of
the experiment, she sat back on her stool and unbuttoned the front of the
coat.  I looked up and did a double take.  She was wearing a skin-tight
white tank top with no bra.  It must have been thin material because her
nipples were easily visible.  I was staring but she pretended not to
notice. This time if she caught me, I had no cover except to quickly look
back to my computer screen.  After a minute or two, I got up and arranged
some things on my bench to have some cover for looking in her general
direction.  Now that I had a straight-on view, I could see the full circle
of her puffy areolas surrounding her slightly large nipples.  I heard the
door open and saw the janitor coming in with his giant broom.  Karen
casually pulled the lab coat so it mostly covered her chest while the
janitor moved past us, listening to his headphones.  He did a quick sweep
and was out in two minutes.  As soon as he was gone, Karen moved to adjust
her shorts which had the added effect of sweeping the coat back, returning
my wonderful view.  She obviously knew what she was doing.  The elastic of
her shorts was folded over, probably more than once, making them
ridiculously short.  They rode so low on her hips I wondered if she had to
shave to keep her pubic hair from peeking out.  Her top extended just below
her belly button, leaving a wide strip of skin exposed.
   As eight o'clock approached, Karen buttoned up the coat and took her
samples off to another room to analyze the results of her experiment.  In a
few minutes, she returned, took the coat off and tossed it over the back of
her chair.  She sat down at her computer for a few minutes, then asked me
if I could take a look at her results.
   "I think it worked this time," she said.
   I rounded the bench and sat down on the stool next to her desk.  She
talked for a while, explaining the conditions of her experiment while
pointing at various things on her screen.  This gave me plenty of time to
gaze at her chest as she leaned forward and back, and at her thighs. 
Sitting down, her shorts pulled back to the point that they looked more
like underwear.
   "Your experiment definitely worked this time," I told her, "but the
results are confusing."
   "I know," she said, "but they remind me of something I read recently."
   Karen got up from her desk and walked over to a filing cabinet where we
filed back issues of scientific journals.  She leaned over to open the
bottom drawer and filed through the contents looking for something.  In
this jack-knifed position her ass was sticking up in the air.  My eyes
followed her thighs all the way up.  Her shorts were struggling to cover
ass.  I could see the crease line between her ass and thighs.  Was she
wearing underwear?  The shorts were yellow and they were pulled so tightly
over her butt that if she were wearing anything underneath, the lines would
have been visible, but all I saw was smooth.  The a bundle of material
cupped her crotch, nestled between her cheeks.  I stared at it, trying to
make out any of her pussy, but I couldn't.  Eventually, she plucked out a
journal and stood up.
   "I think this is the one," she said, going back over to her desk.  She
sat down facing me and pulled her knees up so that her heels rested on the
front of her chair, touching her butt.  She was short enough to accomplish
this; I had seen her sit like this before, except not from this angle.  She
had the journal open between her face and pulled-up legs as she slowly
flipped pages, looking for something.  Her legs were parted just enough
that I could see her inner thighs.  Her crotch was cupped, as before, by
the seam of her shorts, with a gap on either side.  With a slight tilt of
my head, I could look down either one of her shorts legs to see the spot
where her thigh ended, the skin right next to her pussy.  If she had any
underwear on, I would be looking at it.  If there was any hair, I would be
seeing it.
   "Okay, this is the paper I was thinking of," she said, holding it out
for me to see.
   "This does look similar to what you're seeing in your results, but some
of the conditions are different.  If you re-run your experiment using the
conditions they published here, it would tell us if your results are
showing the same thing."
   "Okay," she looked around her desk.  "Um, do you have a pen?"
   "Yeah," I said, getting up and heading over to my desk.
   I came back and handed her the pen.  She was back to reading the article
and absentmindedly took the pen from me.  I wasn't sure if I was supposed
to stick around, but I wanted to take advantage of any extra peeks.  Her
legs were still pulled up to her body so I checked to see that she was
preoccupied and looked back down toward her crotch.  Holy crap!  Karen must
have made a quick adjustment while I was gone.  The crotch of her shorts
was more to one side now and I could see the edge of her outer labia on one
side.  It was completely hairless.  I looked back up but Karen was quite
engrossed in her reading.  Looking back down and tilting my head a little,
I could just see her slit.  No inner labia poked out.  Her pussy was
totally bare with a clean slit running down the middle.
   "Alright, thanks for the advice," she said as she lowered the journal. I
appreciated the brief heads-up so that I was looking up by the time she
looked at me.  Not that we both didn't know what was going on, but the
charade allowed us some plausible denial of the situation.  Plus, it was
fun.
   "No problem," I said, "anytime." I went back to my desk."
   "Actually, one more thing, if you have time," she said.  "Since you've
run this experiment before, can I see what your results look like?" "Sure,
just give me a minute to find where those files are," I said.  This was my
chance to repeat what I'd been doing with Grace.  Would it be as exciting
with a 23-year old?  My dick was already pretty hard from the sights I'd
been enjoying, so I positioned it down my right pant leg as usual and gave
it a few strokes to get it to its full length, then quickly pulled up some
images on my computer.
   "Okay, I've got the images up," I said.  Karen came around the bench and
pulled the stool up close to my desk.  I could smell her shampoo.  I'm sure
she noticed my crotch immediately but I didn't look in her direction. 
Instead I acted oblivious as she had earlier.  "These are actually figures
from the paper we published last year," I was just talking to talk.  I
rolled my seat back and leaned back a little to make my dick the center of
attention.
   "Oh, okay," she said.  "I haven't seen it before.  It's much more... 
robust than I expected."
   "Thanks, I worked really hard on it."
   "I'll bet.  Well, I guess I can just read the paper for more details."
   "Okay," I said, "but feel free to ask if you have any questions."
   "I will, thanks," she said, heading back to her desk.
   I sat there thinking about what to do next, but it looked like Karen was
packing up.  I wasn't going to get any more work done so I started doing
the same.
   "Oh, are you going home?" she asked, "Can you walk me home since its
dark out?  I don't usually stay this late."
   "Yeah, no problem."
   Karen pulled a little cardigan out of her bag and draped it over her
shoulders so it was not so obvious that her nipples were nearly poking
through her shirt.  We walked across the dark campus toward the apartments
where most of the grad students lived.  Karen opened up a little about
Jake. She had dumped him, it seemed.  She seemed like quite the
heartbreaker.  As we walked the leafy paths, her cardigan slipped off and I
picked it up for her, but she didn't put it back on, just held on to it.  I
got a decent glimpse of her nipples each time we passed under a lamp.  We
passed a couple of undergrad guys, one of whom took a good look at Karen. A
moment later I heard him behind us telling something to his friend.  I have
a pretty good idea what that conversation was like.
   "It's chilly for summer, huh?" Karen remarked.
   "Yeah, it is."
   Indeed, her nipples were pushing out further on her tight tank top than
they were before.  Soon we arrived at her apartment tower at the edge of
campus.
   "Thanks for walking me home," she said.  "You're a good guy.  I hope
your girlfriend appreciates that."
   "Thanks."
   She turned and went into the lobby of her building.
   That weekend I went camping with my girlfriend.  I fucked her in our
tent both nights and once on Saturday morning, thinking of Karen and Grace.
Her sexual appetite was at least as strong as mine and she was thoroughly
pleased by this.
  
Grad School Lab Experiments Ch. 3