Re: look alikes
@soozyg- Well, impossible to say 100%. We dont know how it works. But I'd say the vast majority of why we do it is nature. And the ways to overcome it is nurture.
We pick these similarities for genetic and evolutionary reasons. You don't know, for example, what a person's immune system is like or their similarity in olfactory prowess. You might be attracted to friends because they hang out in the same place (say the candle shop) that might be a subtle clue to these things. But you don't really know. We're predisposed to want to help our "kin" for evolutionary reasons.
That said, the brain patterns that pick this stuff out can be consciously overridden. And that is nurture. So, a manager can learn to overlook it. A person can find friends of all types. And they aren't even all that hard to overcome if you are aware of them, so I'm not giving racism a free pass.
i'm saying that you need to be aware of these human tendencies and be concscious not to let them overwhelm your better judgment.