He wasn't grossed out?

My boyfriend and I had sex today and I just started my period early this morning.I'm surprised he wanted to go on with it.I had a hard time telling him I had started.I was all quiet and I finally told him,"I started" and he as like "OH ha ha,all you had to say was It is that "time of the month"I told him "Don't you think that is nasty?" he was like "No,I don't mind baby"Don't guys grossed out by the smell/mess?I know it was kind of embarrassing and awkward for me.