Catholic boyfriend?

Izabel • Swimming and Art
So I'm an atheist and my boyfriend is a Catholic. To say the least I'm his first serious girlfriend, kiss etc... whereas I've already lost my virginity. And I'm curious. Can I give him a blowjob and still be respecting his faith? Because he's open to the idea but I know his faith is important, so would he be able to be "holy" and still receive head? 😂