My sister's dog reacts (poorly) to an advertisement for Meow Mix brand cat food.
Funnily enough, I feel very much the same about cats. I've met ones I liked, but I'm told these aren't "real" cats, but rather the aberrant species, the "dogcat"--friendly, happy, attentive, good-natured, loving, among other appealing traits.
Instead, too often I encounter the true cat, the cat archetype, if you will. Surly, mean, indifferent, hostile, opaque (often misinterpreted as "mysterious"), prone to lash out when you're least expecting it, and prone to shed everywhere.
And if I wanted something that unpleasant as an unfaithful companion around my house, I'd just get another god-damned boyfriend.