I guess I am rather slow at this but anyway I have had sex with my BF when I was having my period once. It is really messy and I don't really like it. So if he is horny and I am having my period, I will give him blow job instead. Maybe if u really want to try it, try having sex in the bathroom so you can just shower and have sex at the moment.

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~~True love doesn't have a happy ending because true love never ends.~~