What does anal sex means?
Anal sex most often refers to the sex act involving insertion of the penis into the anus of a sex partner. The term anal sex can also sometimes include other sexual acts involving the anus, including anal–oral sex, fingering, and object insertion. A 2009 study of American college undergraduates, the large majority heterosexual, found that one in four reported having had anal sex, while the figures for the general population range between thirty and forty percent.