I don't even drink milk. But at the end of the day the people that do drink milk are going to grow up nice and healthy and strong and have lots of babies that are also tolerant of lactose. I think I got off the track a little bit there. Interestingly one of the negative effects of the domestication of animals is that lots of people are going to die because animals bring diseases. We're going to get the measles and influenza and smallpox. But again through survival of the fittest, through evolution, people that do survive are going to pass on those stronger immunity systems that are going to protect them from those diseases to their offspring. We're also going to talk about the division of labor.