I don't go there. And she always says I can but, I dunno. I think it's disrespectful in a way, I'd rather just let it run it's course and smash it when it's ready.
I have before, but things are a little different now. I had never had an orgasm before I was 25 or so. Not from sex, not from masturbation. Up until that point I had had sex while on my period, and while it was a little messy, it wasn't a big deal. Throw a towel down and we could clean up afterward easy. A couple of years ago though, it was like a switch was flipped. Now I'm prone to multiple, squirting orgasms and if a towel contains the mess we consider ourselves lucky. I haven't tried period sex since this "change" happened because I have this horrid gross paranoias about... well. I won't go into details. Let's just say, I'm mistrustful of my vagina. Anyway, the week before and sometimes the week after my period, I'm an absolute sex fiend. Absolutely insatiable.