We love it for many reasons. All guys are different so I can’t say why your guy likes it. Personally, I love it because you are supposed to believe it is wrong. Also I love it because when done properly, it feels amazing for both of you. Some people like it for the pain factor, which is part of it, but not all of it.
But I would never trade it for the pussy. No fucking way. Not even close. But that doesn’t mean I don’t love it. It’s just one more area to play with.