If you engage in anal sex, it is always important to use a condom to protect against the spread of infections and diseases. Decide for yourself how much risk you want to accept. Oral contact with the anus can put both partners at risk for hepatitis , herpes , HPV, and other infections. Often referred to simply as anal sex , anal intercourse is sexual activity that involves inserting the penis into the anus. The anus was designed to hold in feces. There are a number of health risks with anal sex, and anal intercourse is the riskiest form of sexual activity for several reasons, including the following: Even though serious injury from anal sex is not common, it can occur. Too-rough anal sex can stress and possibly tear the anal lining, which can lead to very serious infections. Continued Anal sex can carry other risks as well. With latex condoms , always use a water-based lubricant. The anus lacks the natural lubrication the vagina has. In fact, far more straight people than gay people practice anal sex! Even if both partners do not have a sexually-transmitted infection or disease, bacteria normally in the anus can potentially infect the giving partner. The main guidelines for anal sex are Communication, Relaxation, Lubrication. Your external sphincter is under your voluntary control—you can relax it at will. While some people find anal sex enjoyable, the practice has downsides and requires special safety precautions. The anus contains more nerve endings than any other part of the male body, and more than any part of the female body except the clitoris.