Does the moon have any effect on human mind? ...on new/full moon?

The moon causes tides in the oceans (though Sun is also there). Water covers around 70 percent of the earth see reference. Human body has around 50 percent of water see reference. Since moon is prominently responsible for rise or fall of water on earth, can it have any effect on humans?

I concede, there is no clear relation of water in human body and the human mind, but there are lot of stories of unusual human behaviour on either full moon or new moon.

And to add to that I am observing this on one of my friends. This unfortunate friend was quite normal before, but something happened and he started behaving unusual. Now, sometimes he is talking like a normal adult, but suddenly starts running out on the road yelling, cursing. He calls my home number and talks literally anything – like from murdering me or my parents when new moon approaches. This has happened for several months. He calls up any time; once he called at around 3.30 midnight. So, he has been now locked inside his house. This is an unusual and unfortunate example for me to experience; since I have lost a good friend of mine.

We were told many stories of ghosts rising on new moon night in my childhood days. I have learned also of werewolves on full moon.

Can the moon has any effect on humans? What? Could you explain it for me?
Thanks in advance!