For those more sensitive areas you want to make sure you’re getting a razor body where the blade doesn’t protrude as far. Henson shavers are incredible quality but I dont remember if they have a razor body suited for body hair.

The idea with these razors is to not apply much pressure, just letting the weight of the razor itself do the pressing. As long as youre doing that, and not holding it at a stupid angle, you should find it quite difficult to hurt yourself shaving your head. Same goes for your pubes, but if you’re going to shave your balls with it you’ll need to take a lot of care.