Is it alright for my bf to cum inside me?

I've been with my boyfriend for a year now and we always had sex all the time first with a condom now we don't use a condom. He always pulls out. I've been on birth control for years and I never ever miss a day on the pill. I'm wondering if it's ok if he could cum inside me while I'm on the pill. I'm curious about the feeling of it so it would only be a one time thing to try.