He wants to eat my ass 🍑

I've known this sexy guy for 3 years, we never had sex before, just really steamy make out sessions off and on where he would eat me out pretty good in a car every time. It feels f***ing amazing! He really gets me hot and horny! However... He keeps telling me he wants me to be his girl and asks me if he can eat "mi culo" (my ass). Should I let him? I never had a guy ask me this before, he knows I'm very clean also.