well then you're not welcome here!
J/K
as for sex on your period. Well I do think it's gross, but to each their own, if you and your partner don't mind then I say go for it.
But even if I didn't think it was gross, I'm certainly never in the mood for sex, all I want to do is wear big sweatpants, and curl up into a litle ball and hid away for a week.