I shave weekly, or more often when some one is going to see me naked. The trick is to do it in the shower and let the hot water often the hair first. Use soap and shower thoroughly first to soften up the hair. Then just use normal shave cream and a multi (3) blade razor. Around the balls, pull the skin taught and be very gentle. Around the ass, you just have to reach back and do it by feel.
The first few times you may experience bumps or rashes, but after you do it for a while, you won't get any more bumps. Apply some moisturizing cream after you dry off.
I've tried Nair once, but it's a little dangerous. You have to make sure you don't get it on your cock head. And if you have a cut anywhere, it really hurts when the Nair touches that area.
All the girls I've been with love the smooth feel and look, especially when I'm wearing a tiny thong. They also appreciate sucking on a hairless cock because they won't get any hair in their mouths. I also appreciate a bald pussy. No hair in my mouth when I suck on them too!