- HUMAN IMMUNODEFICIENCY VIRUS
- HUMAN VITAE
- HUNG
- HUSTLER
- HYMEN
- HYPOSPADIAS
- IMPACT PLAY
- IMPOTENCE
- INCEST
- INCOMPETENT CERVIX
- INDOOR SPORTS
- INFIBULATION
- INFLADATING
- INTERSEX
- INTERSTITIAL CYSTITIS
- J-LUBE
- JACKING of JERKING OFF
- JACK‘N’JILL PARTIES
- JADE STALK
- JANEY
- JAPANESE BONDAGE
- JELLY ROLL
- JOCKSTRAP
- JOHN
- JOHN THOMAS
- JOHNSON
- KEGEL EXERCISES
- KINBAKU or SHIBARI
- KING’S THREESOME
- KINK
- KINSEY AVERAGE
- KNICKERS
- KNIFE PLAY
- KNOCKED UP
- KNOCKING BOOTS
- KY JELLY
- KYLEENA
- LABIA MAJORA
- LABIA MINORA
- LABIAPLASTY
- LAD MAGS
- LADYBOYS
- LANDING STRIP
- LAPAROSCOPY
- LARC or LONG ACTING REVERSIBLE CONTRACEPTION
- LAWRENCE V. TEXAS
- LAY PIPE
- LEATHER
- LEG SPREADER
- LESBIAN