If you would’ve guessed that as a whole men’s lust for sex would generally rise in the spring months, think again. According to research conducted at the University of Tromsø in Norway, it’s women whose sexual desire increases in the spring months, and it’s not because men are trotting around the parks with no shirts and Frisbees. Instead, the rise of libido is thanks to the return of light and sun.

Triggered by various amounts of hormones, like endorphins, it’s not surprising that researchers found sunlight would help aid men in the search to find a woman with a sex drive, but it is a little strange that men and women’s sex drives wouldn’t spike at the same time. Surprisingly, men seem to be more interested in sex in the autumn. Maybe it’s because they spend more time inside checking out old Playboy spreads than they usually do in the summer.