The human anus is the external opening of the rectum. Two sphincters control the exit of feces . For a male insertive partner, the tightness of the anus can be a source of pleasure via the tactile pressure on the penis. Pleasure from the anus Structure · Function · Clinical significance · Society and culture. Mar 15, - Now, onto today's topic: how to touch a guy's butt, taint, and anus. are eight ways to help your man open up (hah) to the joys of anal play.