In short, QFT predicts that objects near the central apex of a rapidly spinning object will feel a force proportional to the objects inherent rotation. Thus, people weigh less at the equator because they do not spin, whereas the water in the ocean stays where it is because it rotates with the earth and thus has some of it's own spin. To prove that rotation does indeed cause gravity, we need to examine our culture. I think that everyone will agree that society revolves around sex. People cannot live without sex.
Sex is very important.
You might even go so far as to say that people are attracted to sex. Attracted in the same way in which someone is attracted to the earth. Thus it follows that sex has gravity, and people are drawn towards it. It is hard to deny the fact that attractive people at parties attract a group of people around them, whereas the unattractive people sit in the corner alone. Because society revolves around sex, and because sex has gravity, it is clear that anything that revolves has gravity.