Num nums... eating out?

Ok well where the start?

My bf wants to eat me out.. I k r normally it's that the girl wants them to but for me its he wants to. Anyway. He once ate me out and once we had finished he told me what it was like. (We do this so that we know what each other like and don't like) I asked him what it tasted like because I was curious and he said it was kind of a metallic taste.

I don't think he liked it; yet he wants to do it again?

I don't no I'm pretty self conscious of my lower region because sometimes it doesn't exactly smell appetising. I no this is a normal woman thing but what should I do??

Should I let him? I want him to but I'm embarrassed I guess.