Things That Bang

Sins of the father visit the son, ancestral karma call it whatever you want but studies suggest that defected sperms can be passed generations down:

Scientists say fathers who smoke and drink should be aware they are potentially not just damaging themselves, but also their heirs. Tests on rats showed sperm damage caused by exposure to garden chemicals remained up to four generations later.

Ladies, this obviously means the bad boys are out if you wanna make babies or time for some nerdy insemination;)