I know lots of guys who like to use every opportunity they can to roam around without their shirt on. On the same note, I have yet to meet a guy who hasn't *at least once* tried wearing a shirt just 1 size smaller than their own just to appear a bit more buff (before you raise you hand and say you're one, I'll tell you that I'm not at all surprised.) Heck- i love showing off and having that occassional girl give me the looks. It's conditioning. So it stands to reason we let the other gender have their liberty as well. People can wear whatever the hell they like (or lack thereof) and if you have a problem with that, don't leave the house buddy.