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The association between cats and lunacy is a common one in pop culture. Think of James Bond’s villain Ernst Stavro Blofeld (Number 1) and his cat, or Inspector Gadget’s Doctor Claw and M.A.D. Cat; or think of Dr. Eleanor Abernathy, the Crazy Cat Lady from The Simpsons. Is it somehow stored in our collective unconscious that cats go hand in hand with mental illness? Where did this perception come from? Is there a reason? Apparently, yes. It turns out that this association may not be totally random.

Source: Cats And Mental Illness – The Role Of Toxoplasma gondii | Brain Blogger