| Age/Gender | |
| Ma/Fa | Adult Male over 18, Adult Female over 18 |
| mt/ft | Teen Male under 18, Teen Female under 18 |
| Ma/ft | Adult Male over 18, Teen Female under 18 |
| mt/Fa | Teen Male under 18, Adult Female |
| Fa/Fa | 2 or more Females over 18 |
| ft/ft | 2 or more Teen Females under 18 |
| Fa/ft | Adult Female, Teen female under 18 |
| boy | Boy 12 years old or younger |
| girl | Girl 12 years old or younger |
| Ma/Ma | 2 or more Adult Males over 18 |
| Ma/mt | Adult Male, Teen Male under 18 |
| mt/mt | 2 or more Teen Males under 18 |
| Ma | Male adult 18 and over |
| Fa | Adult Female 18 and over |
| mt | Teen male under 18 and over 13 |
| ft | Teen female under 18 and over 13 |
| Mult | Multiple Partner. ie MFF or mmmF, (done like this because of the endless combinations that cannot be all included) |
| Teenagers | Cast of story is mostly teenagers |
| Level of Consent | |
| Blackmail | Blackmailing somebody to force them into the sex act depicted |
| Coercion | Not exactly blackmail, but applying different kinds of pressure to force into the act. |
| Consensual | All parties are consenting to the act |
| Drunk/Drugged | One party at least is Drunk or drugged and participates while under the influence without really knowing |
| Hypnosis | One party using hypnosis for sexual purposes |
| Lolita | A pre-pubescent child (boy or girl, 12 or younger) initiates sexual contact with an adult |
| Mind Control | Stories where one party somehow controls another's mind |
| NonConsensual | At least one of the parties is not participating willingly |
| Pedophilia | An adult initiating sexual contact with a pre-pubescent child (boy or girl, 13 or under) |
| Rape | Stories with violent rape |
| Reluctant | Start as non consentual and then the non consenting party participates willingly |
| Romantic | Mushy love story |
| Slavery | Slavery, sexual or otherwise |
| Teen Siren | An underaged girl 14 or over, seducing or tempting an adult |
| Sexual Orientations | |
| Gay | Self Explanatory |
| Lesbian | Self Explanatory |
| BiSexual | Self Explanatory |
| Heterosexual | Self Explanatory |
| CrossDressing | Men dressing as women and in women clothing, also vice-versa |
| Hermaphrodite | Person having both male and female genitalia |
| Shemale | Trans women with male genitalia and augmented female breasts from breast augmentation and/or use of hormones |
| TransGender | Gender crossing, mostly men turning into women |
| Story Types | |
| Fiction | Fictitious story, not true |
| True Story | A true story, according to the author. |
| Celebrity | A story about a real life celebrity, the story is fictional of course. |
| Crime | Story centred on or involving crime |
| Fairy Tale | A story involving fantastic forces and beings (as fairies, wizards, and goblins) in which improbable events lead to a happy ending |
| Fan Fiction | A story using characters from movies, TV shows or Comics |
| Farming | Story set on a farm or about working a farm |
| Futanari | Stories with Characters that have mainly female bodies but with both female and male sexual organs |
| GameLit | Stories with gaming elements essential to the plot. Often includes features of Science Fiction, Fantasy, or Science Fantasy. |
| High Fantasy | High Fantasy, sword and sorcery and such |
| Historical | Story that is set in past history, mostly related to famous people and events. |
| Horror | Horror Elements in the story, erotic or otherwise. |
| Humor | Contains humor or the story is a spoof |
| Military | Story in a Military setting |
| Mystery | A suspenseful story about a mystery |
| Rags To Riches | Building a large business/fortune starting with little or no money |
| Restart | Restarting personal life from scratch after an involuntary event like bankruptcy, dislocation due to war, emigration, coma etc... |
| School | Mostly in an educational setting (high-school, college, University) |
| Sports | A story with a sports theme |
| Steampunk | Science fiction with 19th century aesthetics using steam power as power delivery medium |
| Superhero | Story contains Super Hero/Heroine |
| Tear Jerker | Sad story or containing sad moments |
| Vignettes | Short stories collection |
| War | Story occurring during a war or somebody goes to a war |
| Western | Set in the old US west |
| Workplace | Story centres around a workplace setting |
| Zoophilia | Different from bestiality, it's about relationships between humans and animals, not just sex. |
| Science Fiction | |
| Science Fiction | Science Fiction |
| Aliens | Science fiction stories with Aliens in them |
| Alternate History | A speculative story where a major event in history occurred differently |
| DoOver | Getting to do one's life all over again |
| Extra Sensory Perception | Perceiving things by means other than the known senses, e.g. by telepathy or clairvoyance. |
| Far Past | Far Past Time Travel or Far past setting (earlier than industrial revolution or before 1700) |
| Post Apocalypse | Post Apocalyptic world |
| Robot | Humans having relations, sexual or otherwise, with non-biological entities (mechanical robots or full blown androids) |
| Space | Story set in outer space |
| Time Travel | Science Fiction, involving travel through time |
| Body Swap | Mind transfer between two bodies |
| Paranormal | |
| Paranormal | Ghosts, angels, spirits, poltergeists, etc |
| Furry | Anthropomorphic animals or 'taurs' (animal bodies with anthropomorphic torsos) it also includes other forms such as dragons. |
| Genie | Djinn or Genie, the magical creature that grants wishes |
| Ghost | Ghosts |
| Magic | Contains magic and supernatural phenomenons |
| non-anthro | Animal in form with human level intelligence. For example Werewolves |
| Vampires | Vampires in the story |
| Were animal | A human that can turn into an animal temporarily. |
| Zombies | Zombies in the story |
| Demons | Stories with demons in them |
| Dolls | Statues, love-dolls, or toys that may come to life |
| Couples | |
| Cheating | One party is cheating on their partner |
| Cuckold | When man is being forced to accept his wife's cheating against his will. |
| Sharing | Partner has sex with selected others |
| Slut Wife | Slutty wife |
| Wife Watching | Man enjoys watching his wife having sex |
| Wimp Husband | Husband does not stand up for himself when faced with a cheating wife |
| RAAC | Reconciliation at any cost. Couple reconciling after one of them cheating |
| BTB | Burn The Bitch/Bastard. A person gets their revenge on their cheating spouse |
| Incest | |
| Incest | Sex between blood-related members of the same family |
| Mother | Incest involving mothers |
| Son | Self Explanatory |
| Brother | Self Explanatory |
| Sister | Self Explanatory |
| Father | Self Explanatory |
| Daughter | Self Explanatory |
| Cousins | Self Explanatory |
| Uncle | Self Explanatory |
| Niece | Self Explanatory |
| Aunt | Self Explanatory |
| Nephew | Self Explanatory |
| Grand Parent | Self Explanatory |
| InLaws | Self Explanatory |
| BDSM Elements | |
| BDSM | Bondage and/or SadoMasochism |
| DomSub | Story about domination, being sexual or otherwise |
| MaleDom | Male Dominant |
| FemaleDom | Female Dominant |
| Humiliation | Degradation of somebody in the story and/or humiliating them publicly |
| Light Bond | Light Bondage, usually consentual and for experimentation at the request of the one of the parties |
| Rough | Rough sex |
| Sadistic | Somebody inflicting pain, physical or mental, for the hell of it |
| Snuff | Killing being done during the act of sex. (Non-sexual murder is in violent) |
| Spanking | Somebody gets spanked in the story, willingly or unwillingly |
| Torture | Self Explanatory |
| PonyBoy | Submissive man who takes the role of a pony; this may include wearing tack such as a bridle and bit |
| PonyGirl | Submissive woman who takes the role of a pony; this may include wearing tack such as a bridle and bit |
| Groups | |
| Gang Bang | Multiple men fucking same woman |
| Group Sex | Multiple couples in the same place or a threesome |
| Harem | There is a harem involved in the story. A traditional old fashion harem, is where an old sultan has a collection of women housed in a palace for his own pleasure. Could apply for newer setting stories where a similar situation exists. |
| Orgy | Everybody is Fucking everybody in a group |
| Polygamy/Polyamory | Multiple spouses or partners (multiple men or multiple women) |
| Swinging | Trading Sexual Partners |
| Interracial Elements | |
| Interracial | Sexual partners of different races |
| Black Male | Self Explanatory |
| Black Female | Self Explanatory |
| White Male | Self Explanatory |
| White Female | Self Explanatory |
| Oriental Male | Self Explanatory |
| Oriental Female | Self Explanatory |
| Hispanic Male | Self Explanatory |
| Hispanic Female | Self Explanatory |
| Indian Male | Male from the indian sub-continent |
| Indian Female | Female from the indian sub-continent |
| Black Couple | Self Explanatory |
| White Couple | Self Explanatory |
| Sexual Activities | |
| Anal Sex | Self Explanatory |
| Analingus | The act of licking the anus |
| Bestiality | Sex with animals |
| Cream Pie | Somebody licks a pussy full of cum |
| Double Penetration | Simultaneous Anal and Vaginal Penetration |
| Enema | Getting an enema as a sexual thing |
| Exhibitionism | Enjoyment of self exposure |
| First | One of the parties having sex is a virgin |
| Facial | Story contains somebody practicing the art of ejaculating on another's face |
| Fisting | Hand and arm or foot insertion |
| Flatulence | Flatulence as a sexual fetish |
| Food | Sex where food is involved, like doing it to a pie or shoving a carrot |
| Lactation | Drinking and playing with human milk |
| Massage | Story contains massaging as part of sexual activity, like foreplay |
| Masturbation | Self pleasuring, could be alone or while with somebody else but no intercourse |
| Necrophilia | Sex with a corpse |
| Oral Sex | Self Explanatory |
| Pegging | A woman performs anal sex on a man with a strap-on dildo |
| Petting | Feeling up and such |
| Pregnancy | Somebody gets pregnant in the story |
| Safe Sex | Sex with proper protection |
| Scatology | Playing with feces |
| Sex Toys | Sex with the help of sex toys, such as dildos and vibrators |
| Spitting | Spitting as a sexual fetish |
| Squirting | Female Ejaculation |
| Tit-Fucking | Getting sexual pleasure from thrusting the penis between a pair of bountiful breasts |
| Voyeurism | Enjoyment of watching other people without their knowledge |
| Water Sports | Peeing on each other |
| Fetishes | |
| Amputee | Sex with an amputee |
| Babysitter | Sex with babysitters fetish |
| BBW | Big Beautiful Woman. Loving Big Women |
| Big Breasts | Women with Big Breasts |
| Body Modification | Erotic body modification, including piercings and tattoos, play a prominent role. |
| Clergy | Involving members of the clergy (Priest, Bishops, nuns) |
| Doctor/Nurse | Medical Fetish, Doctor or Nurse Play a prominent role in the story |
| Foot Fetish | Foot fetish |
| Hairy | Fetish with hairy men/women |
| Leg Fetish | Leg fetish, often with stockings, garters and heels. |
| Menstrual Play | Sex play with a woman who's on menstrual cycle |
| Needles | Includes injections and play or permanent piercings. |
| Public Sex | Sexual events taking place in public |
| Size | Where the size of the sex parts (penis, breasts, toys) plays a major role in the story |
| Small Breasts | Small Breasts fetish. Story where small breasts play an important role. |
| Smoking | Story features smoking fetish or excessive smoking |
| Teacher/Student | Teacher/student relations |
| Other | |
| 2nd POV | Story written from the 2nd person POV |
| Cannibalism | Self explanatory |
| Cat-Fighting | Women having a cat fight |
| Caution | Story contains something that can't be classified but requires caution on the reader's part |
| ENF | Embarrassed woman because she has somehow lost her clothes and cannot avoid embarrassing encounters |
| Geeks | Enthusiast or expert especially in a technological or magical field or activity. |
| Halloween | Story about halloween |
| Indian Erotica | Erotica written in Indian Style |
| Novel-Classic | An old classic novel that is now in the public domain |
| Novel-Pocketbook | An old published pocketbook novel that is not in circulation any more and the publisher has gone under, so it's not going to be published again |
| Nudism | Features scenes set in a naturist/nudist environment |
| Politics | Stories with political atmosphere or events |
| Porn Theatre | Story has events in a porn theatre or Adult bookstore |
| Prostitution | Prostitution elements |
| Revenge | One party gets revenge for being wronged |
| Royalty | Kings, Queens, Princes and Princesses etc. |
| Slow | There is a story and plot development before any sex occurs. Not a stroke story. |
| Transformation | Un-natural physical transformation |
| Violence | Violence in the story, not necessarily of sexual nature |
| Illustrated | Stories with illustrations |