According to Live Science, here are the 10 worst hereditary conditions known to humankind:

1. alcoholism
2. breast cancer
3. color blindness
4. bullying
5. obesity
6. heart disease
7. having twins
8. acne
9. lactose intolerance
10. baldness

When searching for the perfect breeding mate, forget about watching out for Cystic Fibrosis, Sickle Cell, Tay-Sachs, and a slew of other hereditary diseases that often cause early deaths. And ladies, if you happen across a fat, bald guy with pimples and lactose intolerance who bullies his twin brother and drinks too much beer... damn. All I can say is good luck.