My chest is mostly hairless, except my nipples, so I shave them.
1. It makes them easier to lick
2. cum doesn't get stuck in the hair, that shit is a bitch to wash out.
I started shaving my balls when I started to realize how much I loved having them licked. I have very hairy arms, legs and ass, and in the past 6 months i started trimming all that too... mostly for "hygiene" reasons. Having a non-hairy ass makes it a lot easier to keep clean, plus I started running, so I trimmed the hair to get a better tan, and to show better muscle definition.