“A new study from the University of Chicago shows that women who stay up late tend to have similar risk-taking tendencies as men, and that night-owls of both genders were less likely to be in long-term relationships.

Researchers found that men generally have higher levels of cortisol and testosterone than women, but that night-owl women have just as much cortisol as men. High levels of cortisol are usually associated with high energy, arousability, stress and even cognitive function, and some research has shown that successful people usually have higher cortisol levels. The researchers found that high cortisol levels may explain why night-owls take more risks.

In other words, women who stay up late tend to get laid more often, but women who go to bed early and get up early might be more likely to be in stable relationships.”* Cenk Uygur, Ana Kasparian, Michael Shure and John Iadarola break it down on The Young Turks.

*Read more here from Charlotte Alter / Time:
http://time.com/46735/sleep-sex-study-university-of-chicago-night-owls/