Your anus is located on your backside, between your butt checks. Your anus is closed off by two rings of muscle: the internal anal sphincter and the external anal sphincter. Around the anus there are 'corpora cavernosa' or masses of erectile tissue that prevent moisture and air from escaping unintentionally. The anus is the last part of the rectum. It is closed off by two rings of muscle called sphincters. The external anal sphincter is located approximately 1 cm from the opening of your anus. You can flex and relax this muscle on your own, just as you can flex and relax the muscles in your arms and legs.

In humans , the anus from Latin anus meaning "ring", "circle" [1] [2] is the external opening of the rectum. Two sphincters control the exit of feces from the body during an act of defecation , which is the primary function of the anus. These are the internal anal sphincter and the external anal sphincter , which are circular muscles that normally maintain constriction of the orifice and which relaxes as required by normal physiological functioning.

Lots of straight men are turned off by the idea of anal play to be fair, many bi and gay men are too , and as a result are missing out on a whole world of fun. This is the third in a multi-part series from After Hours about anal play. You can see the other posts in the series as they come out here. Seriously though, your anus and rectum are full of nerve endings, just like your penis.