Anal sex refers to sexual activity in which a person inserts their anus or buttocks into another person's vagina, mouth, or penis. This type of sex is also known as anal intercourse and can involve either heterosexual or homosexual couples. The act can be performed using fingers, dildos, or other objects, and it often involves the stimulation of both the anus and the genitals. While some people enjoy anal sex for its own sake, others use it as a form of foreplay before engaging in vaginal or oral sex. Despite its popularity, anal sex can come with risks such as tearing or bleeding if not performed safely, so it's important that those who engage in this activity do so responsibly and with proper lubrication.