"Kitty, Show Me Your Clavacles"

I overhead a coversation in the lobby at work. A couple of people were discussing how cats can get into small spaces: they have no clavacles. So I'm at home and Kitty is just sitting there. "Kitty, show me your clavacles." Husband is watching, and I explain to him that cats can get into small spaces because they have none. "Well that's one smart kitty then, cuz he didn't show you SHIT, did he?".