What do you consider sex?

Let me explain.
I had a friend in high school who always got on my nerves because he claimed to be a virgin. He was Catholic so he was saving himself… He had anal sex with many different partners but still took pride in his virginity. (As did some of his partners) I just never got this. Sex is sex. My friends that are lesbian consider themselves de-virginized and they have never been penetrated anywhere with anything other than fingers! Does God prefer butt sex to vaginal sex?