| anal | - Anal sex |
| b/b | - Homosexual (male) sex, both are under 18 |
| B/D | - Strong elements of B&D (bondage and dominance) |
| beast | - Sex with an animal |
| bi | - Bisexual sex |
| BJ | - Female giving a male oral sex |
| bond | - Strong elements of bondage |
| breast | - Abnormally large breasts |
| c&b | - Cock & ball torture |
| CD | - Cross-dressing (usually men dressing as women) |
| cheat | - Married people cheating without their spouse's knowledge |
| college | - College-theme |
| D/S | - Strong elements of D&S (dominence and submission) |
| dom | - Elements of domination |
| dream | - Sexual activity during a dream (day or sleep) |
| enema | - Enemas |
| exhib | - Enjoying someone watching you have sex |
| F/F | - Lesbian sex |
| fant | - You wish it would happen |
| fem mast | - Female Masturbation |
| fist | - Fisting |
| food | - Sex with food |
| foot | - Foot fetish |
| friends | - Sex between friends, not in a relationship |
| gay orgy | - Sex between more than two males at one time |
| goth | - Gothic setting |
| hair | - Hair fetish |
| het orgy | - Heterosexual sex between more than two people at a time |
| hist | - Has a historical theme |
| hotel | - Sex in a hotel/motel |
| HS | - High School-theme |
| humil | - Humiliation |
| humor | - Funny |
| impreg | - Impregnation |
| incest | - Sex between family members |
| inter | - Sex between people of different races |
| job | - Place-of-work theme |
| lac | - Playing with (human) milk |
| lez orgy | - Sex between more than two females at a time |
| lite bond | - Light elements of bondage |
| lite D/S | - Light elements of D&S |
| lite S/M | - Light elements of S&M |
| M/F | - Heterosexual sex, both participants over 18 |
| m/f | - Heterosexual sex, both participants under 18 |
| M/f | - Heterosexual sex, the male is over 18, the female is under 18 |
| m/F | - Heterosexual sex, the female is over 18, the male is under 18 |
| M/M | - Homosexual (male) sex, both are over 18 |
| M/b | - Homosexual (male) sex, one is over 18, one is under 18 |
| male mast | - Male masturbation |
| MC | - Mind control |
| NC | - Non-consensual sexual activity, not rape |
| necro | - Sex with a dead person |
| no sex | - There is no sex in the story |
| oral | - Oral sex (male or female) |
| petting | - Heavy petting |
| preg | - Sex with a pregnant woman |
| rape | - Non-consentual sex by force |
| religious | - Has a religious theme |
| rom | - Romantic elements |
| rough | - Consensually rough sex, not S&M |
| S/M | - Strong elements of S&M |
| scat | - Involving feces |
| scifi | - Fantasy setting, like SciFi |
| shave | - Shaving of pubic areas |
| snuff | - Killing for sexual pleasure |
| spank | - Spanking, not related to S&M |
| stranger | - Sex with a person whom you do not know |
| TG | - Trans-gender |
| tor | - Elements of torture, severe non-consensual violence |
| toys | - Adult toys |
| true | - Supposedly true |
| TS | - Trans-sexual |
| TV | - Transvestite |
| vio | - Elements of violence |
| virgin | - First time sex |
| voy | - Enjoying watching someone else have sex |
| WS | - Water Sports (aka golden showers) |