Painful sex

M

Ok so- my husband and I have a lot of sex, but for some reason whenever we try to have sex in the missionary position with my legs up (which he seems to love) it’s VERY painful, like a sharp pain and my Instant reaction is to jerk my legs down. If my legs are at his hips then it’s fine, only if my legs are up. I try to just deal with it bc he enjoys it so much, but I’m wondering if anyone has had this before/has any tips as to how to make it hurt less? He does have a very big penis, but this wasn’t always an issue for me. Me being on top seems to be most comfortable, it’s very weird.