Did you know this?

I enjoy this bit of trivia from Scientific American:

Q: A male duck-billed platypus has a poisonous spur, used for self-defense and in fights over females, on what body part?

A: The poisonous spur is located on the hind legs of male duck-billed platypuses.

Why can't I have a poisonous spur? I want a poisonous spur, damn it!