I don't understand. How do people say they accidentally had anal sex because "it just slipped in"? What is wrong with someone's ass that a penis can just "slip in"? Or should I ask what is wrong with the penis?
I know a guy who did accidental anal on a girl. He was just thrusting hard and accidentally came out and when he went back in it went in the wrong hole.
I always wondered that myself. I mean yeah, it can slip out during sex and hit around that area but its not just going to "slid in" someones rear, at least not mine.