Whore - a woman or man who has sex in a professional sense
Masturbate - the process within which you bring yourself to orgasm
Cum - climax, orgasm, reaching the state of ecstasy and release in a sexual sense
Erection - male arousal, where increased blood to the penis causes inflammation of the erictile tissue and a hardening
Jack-Off - a predominately American slang term for masturbation, the English equivalent is wank
Dick - a some what less offensive than cock but more offensive than willy slang term for penis
Public Hair - the hair in the pubic area
Boner - a slag term for erection, an alternate being hardon
Fuck - believed to be from the Saxon, though the etymology is unclear, it means sexual intercourse
Dildo - an artificial penis, usually used for masturbation prepossess, but can be used with strap ons during sex, between two women, two men or a man and woman. - Interesting fact, the ancient Greeks had processions with dildos on big sticks going around, they used them a lot in their theatre as well.
Thong - a small underwear garment, covers the genital area, thin fabric goes between the but cheeks and around the hips. Can also mean part of a whip
Pussy - slang term for the female sexual organs, can also be a slang term for a cat
Condom - a contraceptive that goes over the penis to make a physical barrier stopping the semen. usually made out of latex. If i remember correctly believed to have been invented by the romans using pig intestines, though i may very well be mis remembering things with that one.
Hoe - a word that gangster rappers think sounds cool. Also a garden implement
Horny - to be in the mood for sexual intercourse, or wanting to. Derived i believe from the ancient Egyptian sexual god who hard horns.
I only googled for the spelling of etymology
Long truth got boring filling it in after a while.