[SonicPs]

Isn't it part of human (or just animal) nature to favour beauty and attractiveness ? Honestly, would you prefer to work with attractive or ugly people ? Some customer-oriented jobs even require good looks (flight attendant, salesperson...)

That depends on what your definition of attractivness and ugly is. I'd feel quite at home if I was working with someone who has average looks. But that's just me. Yes it's human nature, but then again, I also believe humans are socially conditioned to want to favor beauty.