Depends on what the man's got and what you like to do together, in my opinion. An extreme shave or shaping does look unmanly to me, however.
On the other hand, if like me you have an extremely hairy shaft, along virtually it's entire length, and very hairy balls, enough to make the other guy gag when he goes down there, and he doesn't like that, then you selectively trim. I've learned to do it so that most guys don't even know I manscape a little, producing a tongue-friendly look that most assume is the natural way I am.
I mean, I cut my hair, shave my beard, even trim my underarms when hair starts sticking out my short-sleeve shirts, so why not my pubes, too, if they need it?