I don't have a bf, but I understand this so much. I almost never want sex, but my period completely changes that along with amplifying my feelings of love for my crush even more. I also don't get cramps, and while I get more irritable, I'm an easily angered, emotional mess most of the time anyway, so there's not a lot of negatives. I feel bad for girls who can't experience a period as awesome as mine. The only real downside is most likely not being able to have sex on my period once I start dating my crush, but who knows, maybe he's into that. Though the greater desire for dick stays for a few days after my period ends, so it's okay if he isn't. I know because my period just ended yesterday.