Had enough of your lip.

The House of Hapsburg ruled most of Europe for about 300 years. They acquired power through marriage, and they kept it by only mating within the extended family. Three centuries is a lot of generations; they got to where they actually shared more DNA than most siblings. The last of the Spanish Hapsburg rulers, Charles II, was his dad's great nephew and his mom's first cousin. He couldn’t feed himself or keep himself clean. He died at 38, and the autopsy stated that he "..had a single testicle, black as coal, and his head was full of water." Just sayin’.