Our happy hour fact to amaze your drinking buddies with.

A yawn may signal that a person wants to have sex, among other things.

Yesterday, at the International Conference on Yawning, scientists presented the latest theory on yawning. The new revelation is based on reports from sexologists that many of their patients yawn during sex and foreplay.

Yawning -- which the average adult does five to 10 times a day -- can also signal that one is tired (which you no doubt already knew) or under stress. As of now, scientists have no ability to distinguish a "let's get it on" yawn from an "I want to catch some ZZZs" yawn.

Nevertheless, we've used this new information to reevaluate every date we've ever been on. It turns out we may have been much more interesting than we initially thought.