Never cum until now

So I’ve been with my boyfriend 6 months he was a virgin when we first had sex (I wasn’t)... obviously the sex wasn’t great at the start but as we have gotten to know each other better and had sex more it’s become amazing. Now every time I have sex with my boyfriend I actually cum and I thought I couldn’t from sex because with both my ex boyfriends I never did.

I know that sounds silly 🙈 but lately it’s just been so so good I just keep cumming on him to the point it’s everywhere 🙊

Does anyone know why maybe I didn’t in the past with my ex’s?