I shave it all. My wife hits the back for me. I just feel gross when hairy, plus it makes a huge differene in how you look.
My wife says it makes my dong look bigger when it's clipped short, which is never a bad thing.
I'm one of the lucky ones that isn't particularly hairy. I use the shortest setting on my clippers for my chest, abs, and pubes. My wife says it makes my dong look bigger when it's clipped short, which is never a bad thing.