My answer is a little complicated. I've not had much more than spotting (except a couple of times) in 7 years. But I've also suffered from endometriosis since early teen years so sex is the last thing on my mind during my first week of my period. After having surgery a year ago, I'm much better with it and experience much less pain so I'm able to after only the first 3-4 days.
The next thing, no, I've never met a man who minded menstrual sex. Never! With my past relationships, I never wanted to have sex during that time. For some strange reason, during that time it feels like I'm giving much more of myself and it feels far, far more intimate to me. ? Strange. Anyways, I refused with my other relationships because to be honest, they just didn't feel worthy and during that time I guess I'm more vulnerable. Don't get me wrong, sex is always, always, always somethign I view as a very intimate thing and it's always a bonding experience and each time (IMO) I'm giving a special part of myself to the person, no matter how many times it's happened. During that time it just feels like I'm giving more of myself. No idea why, but that's my reason for not ever doing it until my current partner and I got together. It took me a while to be comfortable, but after 5 years I'm OK with it and he has never thought badly of it. He says he doesn't think it's gross "it's YOUR blood. When you love someone sooo much, their blood is not a turn off." Those are his words although some men I guess do not feel that it's a clean thing. ?