Okay, I admit, I am a trimmer. (Pubic hair can get dry.) There is a safe way to trim using a comb and a scissor. It's a techinique you see barbers use where the comb is used between the skin and the scissor.

Also, as a hirsute man, a great trick is to use hair conditioner down there while showering. In fact, when my skin is dry all over (as in the wintertime), I use hair conditioner all over when in the shower. It's easy and effective, and beats applying gloopy skin conditioners after showering.