The Big Bang Theory - Gender Representation

Here, in The Big Bang Theory the gender representation is shown very clearly. They are all dressed up, about to do to a New Years Eve Fancy dress party. Every man is covered up with thick outfits not revealing anything, but Penny (the only women) is wearing very minimal clothing and has been made to look very attractive and appealing to men.
The long hair, lots of make up and little clothing contrasts with what the men wear and it's a little ironic as those men don't really see her dressed up like that, hence why they are all shocked when she walks in to the room.
They make snide remarks about what she is wearing (or the lack of it)