If you enjoy sex on your sides while facing the same direction, or doggy-style, in those positions it's relatively easy for the guy to reach around and work on your clitoris. You could also try a vibe on yourself, which would eliminate the scares of long fingernails. :) My boyfriend's big too -- a foot and two inches taller and nearly twice as heavy as I am, lol. *points to icon* It's pretty funny, but somehow, it works, possibly by defying the laws of physics.