I need all of you ladies to please help me

Idek how to ask this but I'm going to try! I'm a sexual person when it comes to having sex with my boyfriend I'm ok with having sex with my boyfriend when It's that time of the month I don't see why it would be a bad thing to do. most of us girls have done it before but I want to ask my boyfriend if he's ok with it but I don't want him to like freak out or get disgusted by me asking. How do I bring it up to him? 😐🤔