25. Women Yawn More Than Men
There are plenty of tropes and stereotypes regarding the differences between men and women, but this one might have some validity. In 2016, an article in the periodical Royal Society Open Science by a team of Italian scientists indicated that in an empirical study of 92 different groups, women yawned much more than men.
The scientists attributed this increased yawning to women being more empathetic than men. This notion is because women yawned contagiously – a behavior associated with social behavior – 55% of the time, while men did so only 40% of the time.