Our happy hour fact to amaze your drinking buddy with.

Females experience more headaches and other chronic pain than males.

Studies suggest that the ladies are 50 percent more likely to suffer headaches, neck pain, knee pain, shoulder pain and back pain than the fellas. Women are also twice as likely to have migraine headaches. To make matter worse for the fairer sex, they are also more frequently afflicted with widespread muscle pain, irritable bowel syndrome and rheumatoid arthritis.

Researchers pin this male/female discrepancy in painful maladies on hormones; estrogen, in particular.

So, it is entirely possible that all those times your special lady friend brushed off sex because of a headache it really didn't have anything to do with you.