Fellatio

Fellatio is oral sex performed upon the male human penis. It may be performed to induce orgasm and ejaculation of semen or it can be used as foreplay prior to sexual intercourse. Although the technique usually involves sucking, rather than blowing, the act of giving fellatio is commonly referred to as giving a blowjob. Fellatio - as well as cunnilingus - can be referred to as 'giving head'.