Vasectomy only interrupts the vas deferens that carry sperm from the testes to where they are added to your semen. It does not alter a man's sensation of orgasm and pleasure. Your penis and your testes are not altered in any way. The operation has no noticeable impact on the man's ability to perform sexually, nor does it affect the balance of male hormones, male sex characteristics, or sex drive. As always, testosterone continues to be produced in the testes and delivered into the blood stream. Your body still produces semen, and erections and ejaculations occur normally. As before, the body naturally absorbs unused sperm. The patient will not feel any different physically from the way he felt before. Vasectomy is simply a sterilization procedure; once it has been performed, a man's semen will no longer contain sperm and he can no longer father a child.