So, me and Neve had been having sex for a good month when we decided we wanted to try butt-sex.
I was still 15 and she was still 13.

We lay naked next to each other on her bed one sunny sunday afternoon.  She got up, turned around and starting jerking me off, then she brought her head down and started sucking my cock.

Gah, Heaven.

She got it nice and slippery then then turned over and got in the doggy style position.  I glared at her cute ass.  God, It was beautiful.  I squeezed both cheeks with both hands and spread them apart, admiring her tight looking asshole.  I put my dick in my hand and then pushed the head against her ass.

She let out a little moan of pain.

I grabbed her ass with both hands and pushed my wet dick into her tight little butt.

She let out a bigger moan of pain.

It's impossible to describe how good it felt, her tight butt.  I pulled it out, then pushed it in again.  She was in pain, but she knew it was for the better.  I was in heaven.  I pushed my dick in and out of her butt a few more times.

It was so tight I came after only about 6 times.  My jizz shooting up her ass.  She relaxed a little bit and my cum mostly fell out.  My 15 year old cock had just taken it's first ass, a little 13 year olds.

She was whimpering a bit, so I said "awww, baby, want me to kiss it and make it all better?"

She nodded.  So I bent down and squeezed her ass cheeks with my hands again, spread her cheeks apart.  Then I kissed her left butt cheek, then I kissed her right.  Then I spread her cheeks as far as I could and drug my tongue down her crack, until I got to her hole, then I stuck my tongue up it as far as I could.

She cooed with pleasure.

I turned her over and shoved my cock into her cunt.