If done right this is one of my favorite things. I have to be up for a lot of pain, though. I had a girlfriend that would suck my balls into her mouth and chew on them with her molars. She'd giggle and hold onto them with her teeth so there was no way I was getting away, and she'd chew harder and harder. I loved it, even though it was terribly painful. If a girl isn't into it, meaning having fun and enjoying hurting them, then it's no fun. Just going through the motions doesn't do it nearly as much for me.