Chocolate Craze
Everyone LOVES chocolate on their periods (except for me, because I lose my appetite).

However, indulge in a little too much of the good stuff, and you could find yourself with worse cramps.
I've heard this second hand, though I couldn't 100% confirm it with scientific knowledge.

I did confirm that chocolate may make you run to the bathroom more and can age skin prematurely (if you eat TONS of it and other sugary stuff regularly).

Lesson of the day: Don't go overboard, even if your cravings DEMAND you eat a semi-truck full of chocolate.