bonobo
A person or animal that becomes aroused by objects, actions, or situations, that would not usually cause arousal in a normal individual.  This term gets its name from the fact that bonobo monkeys tend to become aroused and partake in auto-erotic activities when someone jingles their keys in front of them.
Levi's such a weirdo.  Anytime he sees garden gnomes or troll dolls, he totatlly spanks the monkey.  What a bonobo!!!