Lol, this thread keeps coming back, like cucumbers and coffee.
wildemu, my opinion seems to be in the minority here, but I think a guy can wear tight black leather rock start pants if he's (a) young (which you are), (b) really really confident, or (c) an actual rock star. As for any other kind of leather pants on a guy, I really have no idea, because I've never seen a man wear them!
staysfit, if you're shopping for leather pants that aren't tight and black, then they aren't rock star pants.
AM -- leather face mask -- ahahaaaaa
ETA -- oops, let me amend my first comment. You can also wear tight black leather pants if you ride a motorcycle. I've got an acquaintance who rides, and I've seen him in his gear -- head-to-toe leather -- and he doesn't look like a poseur at all, because he's also carrying a helmet.