why cant people sleep properly on full moon night ?

If someone was to say that humans do not change with the moon, then humans would be the only thing on this Earth that doesn't. EVERYTHING changes with the moon. Many times, if you look around, people act more different on a full moon than any other phase. The gravitational and magnetic change is so minute that sometimes that we don't even notice it, but it can also be so dramatic that some people can't concentrate, eat or even sleep.