Anal sex is when a penis or other object is inserted into a partner's anus. Like any other sexual behavior, some people find it very pleasurable and others don't. Some people are curious about it, and others know it's not something they're comfortable with. There is nothing wrong with engaging in anal sex, but whether it is. Anyone can enjoy anal sex, but it's really important to do it safely so use a condom and lots of lube to prevent friction. 25 Sep Anal sex means sexual activity involving the bottom – in particular, the type of intercourse in which the penis goes into the anus. It is often referred to as 'rectal sex'. Anal sex does carry considerable health risks, get trusted advice.