Costumes.

In my all time favorite play Twelfth Night Viola, the main character, spends most of her time in the play disguised as a man. This would not be such a problem if she did not fall in love with her boss and the woman her boss is in love with falls in love with her. The play considers questions about identity. Viola when she is in her disguise is the best character. She is clever, brave, charming, and loyal. In her disguise she finds this freedom to create a new identity and she does a great job of it. So when she such a great man that she wins the love of the women that every single man was wooing. After she discovers this "love" she says one of my favorite lines in the whole play:

"Disguise, I see thou art a wickedness
Wherein the pregnant enemy does much.
How easy is it for the proper false."

Just look at all our disguises. The way we dress may not always indicate who we are-but sometimes it does. A suit shows our work self. A ratty pair of running shoes shows our physical self.