Inbreeding amongst the royal families in Europe have led to widespread cases of hemophilia in the Royal Princes. It's not just low IQ or missing limbs we're talking about here. Seriously, people who are genetically related aren't supposed to have sex again and again because they're at high risk of producing an offspring with multiple mutations.
Eh? Once is an honest mistake, twice is stupidity, but to repeatedly do it is inviting misery.
