According to research by the German based, Max Planck Institute for Evolutionary Anthropology, male chimpanzees who share the meat they have hunted with a female chimp are able to copulate with their mate twice as much as those that do not share at all.
Apparently, meat is an important part of a chimp’s diet and the female is not a successful hunter – hence she is very grateful.
When you carry the theory over to the human race, it must explain why McDonalds has been such a success …. pass the fries!!