Historically, people have used anal sex as a form of conception. Due to little or no birth control, anal sex was the best way to prevent pregnancy besides abstinence. In the ancient Andean civilization of Moche, anal sex was such a common sexual practice that it was widely depicted in their pottery. So wide that images of vaginal sex on ceramics were rare. In ancient Greece and Rome, sexuality was more fluid. The social construct of homosexuality and heterosexuality did not exist at the time. So essentially, most people were bisexual. And let’s not start with ancient Babylon.