The Lord was talking to Adam and said, I am going to give you dominion over all this land, everything that walks and crawls. Adam ,what is land? and then he said I am going to give you domimion over the sky and everything that flies even beyond the clouds, and Adan said what is sky? Then he said I am going to give you domimion over the ocean and everything that swims and crawls, and Adam said, what is ocean? and he said I'm going to give you something else, I'm going to give you a woman, and I want you to go into that cave procreate and cover this land with your descendants. So Adam went into the cave. He came out a few minutes later and asked, WHAT IS HEADACHE?