Bird dropping facials
The Geisha facial is an ancient beauty secret that works so well, it's been brought back to the present day. But this facial may not take every modern woman's fancy, especially when you know it consists of having bird dropping speckled on your face.
Guanine is a chemical that does wonders for the complexion and bird droppings are a great place to find it. Apparently this method has been around long enough that Japanese kabuki performers and Geisha used to swear by it.