Sodomy is an umbrella term for many forms of non-reproductive sexual activities. Anal sex, oral sex, and bestiality are all considered forms of sodomy. The word "sodomy" is a reference to the biblical city of Sodom which was known as a place where all manner of "unnatural and immoral" sexual activities occurred.
In certain regions, sodomy is criminalized. The specific activities that are legally classified as sodomy differ from region to region as to the specifics of enforcement. In some places, the activities are illegal across the boards and even married couples are forbidden to engage in them while in other areas there are more specific guidelines.
