It depends on the type of look your going for. I personally would not like it that much if my boyfriend shaped his eyebrows like arched and that sort of thing because I think he looks cute a little more rugged. But I don't see a problem with cleaning them up, like tidied up and that sort of thing. If you have some strange stray hairs I do not see why not, lots of guys do that now anyway :) hope this helped
it kinda depends. Just don't pluck them and style them the way a female might. Avoid a unibrow, but don't go too thin if that makes sense. Honestly I usually can't even tell when/if a guy has plucked his brows, but you don't want it plucked so oddly or so thin that it's clear he did it.