Tonight my bf came before I got the chance to and I got very upset. We had had sex earlier in the day and he had cum while I didn't so I thought I'd get mine in the second round. I bitched about it and he felt really bad. But then half an hour later, I was totally fine and I called him to apologize. I started my period today so I'm pretty sure it's due to that but is it okay to blame stuff on your period? Or is that just a lame excuse for bitching?