Originally Posted by itx

Anal sex is a sex act performed on the anus. Anal sex can involve a penis inserted in the anus, oral stimulation of the anus, using fingers for penetration and using different objects for stimulation.

Fellatio is oral sex on the penis of a man, as opposed to cunnilingus, oral sex on a woman. Fellatio is commonly called a blow job.[1] Fellatio can continue until a man ejaculates or as part of foreplay, before actual sexual intercourse.