What "unique" quirks do your pets have?

I’m referring to things that you’ve never seen another animal do… good or bad.

My “poofy” sucks on her paw when she’s really happy (I’ve read of other cats doing this but I’ve never seen it), and she absolutely insists on smelling my breath if I’ve been gone a while, including when I wake up. She’ll actually chase me down until I lean over and blow out of my mouth lightly so she can get right up in my face and sniff. The worse it is, the more she loves it. GROSS.