Forced to perform fellatio

Fellatio describes the oral stimulation of the penis. A common technique of fellatio is to take the glans of the erect penis in the mouth while rhythmically caressing the rest of the penis with the hands; the testes and the shaft of the penis can also be licked with the tongue. Suction is often used to increase the pressure and friction exerted on the penis. As the performance of fellatio progresses, the receiver may contribute pre-ejaculatory fluid to the saliva of the giver, resulting in a more lubricated penis and enhanced erotic experience. This fluid is produced by the Cowper's glands and is not semen, although it may contain traces of sperm.