Sometimes it is cool to do other stuff. Oral sex on him and on you after a shower and a tampon in if you are uncomfortable with doing intercourse while on your period. Or he could just do manual stimulation on you too. Sex can feel incredible, stronger orgasms too.

I remember once my DH said he was okay with it until he saw himself afterwards with the lights on , it kinda freaked him a bit to see blood all over his thing . lol