It’s a place to start, sure, but don’t be surprised if he says no. I’ve been shaving my own balls for decades and I still worry about cutting myself.

Being shaven feels great, and trimming the pubes adds “visual inches” so to speak, so I think there are compelling reasons to do it, but approach the subject delicately. It would be easy to come off as being critical of him. Maybe instead focus on not feeling sexy when you have to contend with the inevitable stray hair, or being interested in getting closer to his actual skin. You can be honest without needing to be brutal.