To be fair, I understand OP's reasoning.  Hams make you desperate for non-hams.  When your white daughter fucks a jobless hoodrat and is going to bear his spawn, you're a lot more eager for her to have been with a mestizo or Asian instead even if you're a nordicist who wishes her red hair were passed on.  When you're a lesbian and everyone else is a massive hamplanet, people who are merely overweight or at the upper end of acceptable BMI look good by comparison.