Oral Sex
Oral Sex is sexual stimulation of the genitals with the mouth, including the lips, tongue and teeth. It includes Cunnilingus, Fellatio, Autofellatio, Autocunnilingus, and Irrumatio (Facefucking). Anilingus is generally considered oral sex, though not oral stimulation of other parts of the body. The 69 position 'sixty-nining' is when two partners perform oral sex on each other at the same time.
Bukkake is a Japanese term, describing a situation where one woman is performing oral sex on a group of men, ending in the woman covered in their sperm.
Daisy-chaining is where a group of people perform oral sex on each other, so that all the participants are joined in one long 'chain'.
Earning your Red Wings is when a person performs cunnilingus on a woman while she is menstruating. It is so called because of the stains likely to be left on the partners cheeks after the act.
Ass To Mouth is when, during anal sex, the penetrating partners pulls out of the asshole and, without cleaning the penis, receives oral sex from that same partner.
Facesitting is a position that typically involves oral sex, either genital- or anal-oral contact.