Handjobs and Lube?

Molly
I started seeing somebody and we fool around a lot when we're together. The other night I started stroking him but I felt weird because I was always under the impression that guys don't like a dry handjob. 
So I'm not sure what to do, do I get lube? Do I not? 
Not to mention he's the first guy I've ever done anything with. So I'm nervous and I don't know what I'm doing..