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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.
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