(Our happy hour fact to amaze your drinking buddies with.)

Due to differences in body physiology, women really do feel colder than men.

The female body is structured to pull all its blood flow toward its core when temperatures dip, because women carry less muscle mass and fat than men. However, this efficient system for keeping vital organs warm means that less blood circulates to the hands and feet.

Research also suggests that a woman's body temperature can vary up to two degrees depending on where she is in her menstrual cycle.

For guys out there who are married or living with a girlfriend, this is why your significant other feels the necessity to outfit your bed with sheets, a blanket, a comforter, a quilt and something you've heard referred to as a "duvet."

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