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.
The anus is a part of the body that is tight and cannot lubricate itself. Because of this, a person should be careful when inserting something without damaging the walls of this organ.
For a man, pleasure comes from the stimulation of prostate that is found near the anus, and for women it comes from indirect stimulation of the G-Spot, clitoral legs, or the cervix. Both men and women can get pleasure because the anus has lots of nerve endings.