- 4 CORNER KISS
- 80-20
- A-SPOT or ANTERIOR FORNIC OF THE VAGINA
- A2M (ASS-TO-MOUTH)
- ABSTINENCE
- AC/DC
- ACQUIRED IMMUNODEFICIENCY SYNDROME (AIDS)
- ADULT GRAPHICS COMMUNITY
- AFTER MARKET
- AFTERCARE
- AFTERNOON DELIGHT
- AGE PLAY
- AIRPLANE BLOND (US) OR AEROPLANE BLOND (UK)
- AIRTIGHT
- ALPHA SUBMISSIVE
- AMATEUR
- AMBIEN SEX
- AMPALANG OR PALANG
- ANAL
- ANAL BEADS
- ANAL BLEACHING
- ANAL MASTURBATION
- ANAL STRETCHING
- ANALINGUS
- ANDRO DYKE
- ANDROGEN INSENSITIVITY SYNDROME (AIS)
- ANDROGYNOUS
- ANHEDONIA
- ANIME
- ANOGENITAL DISTANCE or PERINEUM
- APADRAVYA
- APHRODISIAC
- ARSE
- ASHLEY MADISON
- ASMR/WHISPER PORN or ASMROTICA
- ASS BLOW
- ASS PLAY
- AUTOFELLATIO
- AUTOPEDERASTY
- AVN
- AXIS OF AROUSAL
- BABY TRAPPING
- BAE
- BAGGER or BOY BAGGER
- BALANTITIS or BALANOPOSTHITIS
- BALL GAG
- BALLS TO THE WALL
- BARE-BALLING
- BAREBACKING
- BARTHOLINS GLANDS