I think most women are like me, they get really horny when it is that time of the month. I have had a couple of boyfriends that seemed eager to please me while I was having my period. Afterward when we had made a big mess, I think they kinda got grossed out a bit. Now I avoid intercourse when I am having my heaviest days. If I felt like my guy was really into it, I wouldn't have a problem with it. I think most guys just want to seem cool, or they are just so damn horny they aren't sure what they are getting into. Just on girls opinion.