- CREAMPIE
- CROSS-DRESSER or CROSSDRESSER
- Crossfading
- CROTCH ROCKET
- CRUISING
- CRUMPET
- CRUSH
- CRYPTORCHIDISM
- CRYSTAL DICK
- CUCK QUEEN
- CUCKOLD or CUCKOLDING
- CUFFING
- CUM (COME)
- CUM SHOT
- CUMDUMPING or CUMDUMP
- CUNNILINGUS
- CUNT
- CUNT TORTURE
- CUPID’S HOTEL
- CURVED DICK
- CUT
- CYBERSEX
- CYSTITIS
- D/D
- DADDY
- DAISY CHAIN
- DARK TRIAD
- DARKROOM
- DATE RAPE
- DEEP DYSPAREUNIA
- DELAYED EJACULATION
- DELIVERING THE WOOD
- DEPILATORY
- DEPO PROVERA
- DEPTH PLAY
- DHAT SYNDROME
- DIAL-A-PORN, DIAL-A-FUCK
- DIAMOND CUTTER
- DIAPHRAGM
- DICK FLICKS
- DICKNOTIZED
- DILDO
- DILDO HARNESS
- DO-ME QUEEN
- DOCKING
- DOGGIE STYLE
- DOGGING
- DOG’S BOLLOCKS
- DOM
- DOPPELGANGER(S)