Bf wants to go down on me

Bf wants to go down on me, but knows I’m not a fan of it and is respectful. I’ve had guys go down on me 2x in the past and I’m just grossed out by it. Like I think I’m too much in my head, worried like I may taste gross, or whatever, or thinking does he actually like this?? Idk, I’m contemplating whether to let him go down, maybe he’s good at it, as he says he enjoys it. Anyone else feel the same about getting head??