Hmmmmm.

DNA from a 50,000 year old toe shows Neanderthals were highly inbred

"The DNA studies have now proved that Neanderthals and modern humans interbred, a question that scientists have disagreed over for years. In fact, it is currently estimated that between 1.5 per cent and 2.1 per cent of the genomes of modern non-African people can be traced to Neanderthals."

I've known people who were Neanderthal-like. This could explain some of my observations.