My guy (age 6) decided to tell me how civilisation happened. "First people weren't people, they were monkeys." "Uh-huh" I say. "Then they started to turn into people, but slowly. Then, when they were people, they rubbed their bits together." "Their bits?!?!" "Yes, you know, their man and lady bits." "Their penis and vagina you mean." "Yes." rolling eyes. "Then boom! babies happen. Then they leave Africa and start moving around places. I think they moved to Europe first. Then Asia. Then more rubbing, more Boom!, more babies, and before you know it there's 85 billion people."
Whew. I love listening to his theories, they are really magical and pretty loopy, but always interesting to me.