Eh, I dunno ... my sister, an intelligent woman, firmly believes that "civet cats" (spotted skunks, a very small species of skunk) are a cross between cats and skunks. It is flat-out impossible for skunks and cats to breed and produce offspring, but that doesn't her from believing it.
People also want to believe in wolf dogs and bobcat/cat mixes; those are also impossible. Dogs and wolves are different species, so are cats and bobcats. But look in the classified ads and you will find people selling them.