Getting hair in the mouth is no fun. Prickly is no fun either. Shaved or trimmed looks sexier. One time while having sex though when he was shaved there was some like suction on his groin area due to the wetness. He said it hurt a little and area was reddish. Guess it was like diaper rash.
Just trimmed is nice as a personal preference, but ultimately it depends on whatever is most comfortable for them. If my man decided bald was beautiful or wanted all natural, I'd love his package just the same.