My Little Pony: Friendship is Magic - Image #273,422

"Here we see the elusive human performing one of its most unusual rituals. It uses its appendages to roughly scrape the area around its hindquarters. Pony scientists have determined that this is likely a subconscious attempt by their body to uncover their cutie marks by digging through the outer layer of skin. Further research on the subject is pending."

@Sayer

What's so bad about her knowing how we make masts?