Family in restaurant where I'm waiting on order is discussing genetics (specifically preference for cilantro - it tastes like soap to some people) and the attached or hanging earlobes thing came up as another example of genetic traits.
"Unless you're Joe Biden in the last 20 years", one of them said.
Tell me we're not winning.
Never bought any explanation besides plastic surgery to be quite frank. As far as body doubles with spot-on impressions and facial prosthetics I'd have to see that for myself to believe it.