There are certain lines that you are not meant to cross no matter what the situation calls for. However, you might commit the mistake unknowingly. For example, a man entering a women's locker room. Now, no guy will knowingly do that (only because actions will be taken against him). But what if the women's locker room was labeled as men. You wouldn't know what the heck to do!
Well, so it happens the following guys were clueless as well.
Now, this can confuse any guy in the room. Any room.
Whoa! Did not see that coming, huh?