It's even nicer when you get a girl to shave your balls for you, trust me. Ever since I shaved mine my wife can't keep her hands/mouth off of them. She also likes the way they feel when they slap her ass, hehehe. If you trim down the surrounding hair too it looks even better.
No babe, we don't shave the WHOLE AREA (well, some do)...we're just talking balls here. I shave 'em nice and clean and also right round the pole, and just trim the patch up top. Gives it all a nice clean look, helps with hygeine, my girl appreciates it when she's in that location, etc. Not to mention it feels better, IMO. Every girl has only given good comments about it since I've been doing so (4 years).
LOL bro! Make sure you use a nice sharp razor (Mach3 works awsome) and get the skin as tight as possible. If you've got big dogs it's not the easiest of tasks, but you'll get better at it. Plus, that area stops bleeding pretty quickly if you nick.