Be careful of using hair clippers down there, once when I did it, it nicked my skin and started bleeding. Had to cancel the punt that day as I knew if the wg saw it she'd refuse to give me OWO.
I still use the clippers above my dick etc, just not directly on it or my nuts. Now I just use a normal gillette razor at the end of a bath or shower, no gel needed and I've never cut myself this way.