Dear friends who think it's disgusting my boyfriend knows when I have my period,
He wants to know so he knows I'm safe and healthy, and so that he can comfort me. You hide your PMS from your boyfriends; mine tells me he loves me whenever I get sad, and listens to me when I'm mad, and wants to cuddle me when I have cramps. He wants to make me Ramen and tea and would rub my back and stomach to relieve cramps. It's one of the most caring things I can imagine, it's not "disgusting". I got lucky, you didn't, don't take it out on me and him.