Using your hands first, gently caress his inner thighs, penis, scrotum, testicles, and perineum, paying attention to his reactions (verbal and facial) as you touch certain spots. Many men who have sensitivity in their penis are particularly sensitive around the head (known as the glans), especially the frenulum, an indentation between the glans and the shaft on the underside of the penis. You might want to brush up on your knowledge of male sexual anatomy, to know what you’re working with.
Orgasm The orgasm itself occurs in two phases, emission and ejaculation. In emission, the man reaches ejaculatory inevitability, the "point of no return." Semen is deposited near the top of the urethra, ready for ejaculation. Ejaculation occurs in a series of rapid-fire contractions of the penile muscles and around the base of the anus. Involuntary pelvic thrusting may also occur. The nerves causing the muscle contractions send messages of pleasure to the man's brain.
^ Jump up to: a b Tan, Min; Gareth Jones; Guangjian Zhu; Jianping Ye; Tiyu Hong; Shanyi Zhou; Shuyi Zhang; Libiao Zhang (October 28, 2009). Hosken, David, ed. "Fellatio by Fruit Bats Prolongs Copulation Time". PLoS ONE. 4 (10): e7595. Bibcode:2009PLoSO...4.7595T. doi:10.1371/journal.pone.0007595. PMC 2762080. PMID 19862320. Retrieved October 28, 2009.
Oral sex is not necessarily an effective method of preventing sexually transmitted infections (STIs), although some forms of STIs are believed to be less commonly spread in this way, and oral sex has been recommended as a form of safe sex. In the United States, no barrier methods for use during oral sex have been evaluated as effective by the Food and Drug Administration. However, a barrier protection like a condom for fellatio or dental dam for cunnilingus can offer some protection from contact when practicing oral sex.
Nancy Friday's book, Men in Love – Men's Sexual Fantasies: The Triumph of Love over Rage, suggests that swallowing semen is high on a man's intimacy scale. The man receiving fellatio receives direct sexual stimulation, while his partner may derive satisfaction from giving him pleasure. Giving and receiving fellatio may happen simultaneously in sex positions like 69 and daisy chain.