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You flip the cat's ear inside-out, so it cups backwards instead of forwards, convex instead of concave. The faster the cat flips it back, the smarter the animal is. The really smart cats won't even let you do it. The dumbest of cats take 30 seconds or so to notice.

OMG.....I have a Himalayan Persian and you can't even get his ears to do that (hahaha not from want of trying). What does that mean!!!!!!LOL.