Anal sex is the stimulation of the nerve endings in the anus by the fingers, mouth, penis or any other sex object, such as a vibrator or dildo.
josh gave me anal sex last night
The term sodomy comes from the biblical city of Sodom, which, in the bible, was destroyed by God for its sins. In the 1950s, almost all the states in the US had laws banning sodomy, but a 2003 ruling by the Supreme Court found sodomy laws unconstitutional, and repealed the laws in the 10 states that still had them.
Sodomy--A word with religious origins used to describe sexual acts, specifically same-sex anal sex.