Shave her just enough so i can lick her out without too much hair in my mouth, or even getting caught and riding into her on my cock. Yes it happened.
I'd be nervous shaving my balls and keeping them hairless. Well, if she (or he) wanted that I suppose. Shaved the base of my cock once, which had very few noticeable hairs,and then black pubes grew up the first inch or so.
Never had a problem or cut myself on them....but then again, there's not a lot there to begin with. They feel great smooth....and sensitive...
I love it! It serves a satisfaction of pleasing my partner by helping her when she doesn't have to do it herself. Also, you get to 'test" the smoothness afterwards.