Getting Eaten Out

Alright, so I’ve never been eaten out before but it sounds fucking amazing. The only problems here are:

A) I’m too nervous to ask my bf for it

B) I’m REALLY self conscious

C) He’s never offered so idk if he would be okay with it but I suck his dick pretty often so it kinda seems a bit unfair

The other night we did a bit of longer foreplay and he was fingering me (he’s still pretty new at it and even with my coaching isn’t really hitting it 🤷🏻‍♀️) and he like had me suck his fingers which I didn’t really mind and kinda hoped he’d see that I didn’t mind tasting myself (he doesn’t mind tasting himself either apparently because he ALWAYS kisses me after I blow him) and that he’d maybe want to go down on me. It didn’t happen but he did suck his own fingers for a moment, getting a taste of me before going back to trying to please me.

What should I do? How can I get up the nerve to ask him for it?