Is it normal to be nervous?

I've been talking to this guy that is 2 years younger than me. For some reason in the back of my mind, I can't help but to think that he's young, innocent and does not know what he's doing. We've gotten a little risque recently (touching, lap dances, etc.) and he's thinking about taking it to the next level (aka he wants his dick sucked) but he's never done it before (I'm not sure that he's fully ready). He hasn't said one thing about eating me out though and I really want him to return the favor if I give him head. Is it normal that I'm scared to ask him to, or will he just do it?