Women choose bad boys because their hormones make them, new research suggests. When ovulating a woman’s hormones influence who she sees as good potential fathers, and they specifically pick sexier men over obviously more dependable men.

“Previous research has shown in the week near ovulation women become attracted to sexy, rebellious and handsome men like George Clooney or James Bond,” study researcher Kristina Durante, of The University of Texas at San Antonio, said in a statement. “But until now it was unclear why women would ever think it’s wise to pursue long-term relationships with these kinds of men.”