Women seeking to impress men on the dance floor might want to consider strutting their stuff when most fertile. Men shown videos of women dancing and walking were most attracted to their moves when the women were close to ovulation. Bernhard Fink, at the University of Göttingen, Germany, and colleagues filmed 48 female students aged between 19 and 33 while they walked towards and away from a camera or danced to the drum track of a Robbie Williams song. The women walked and danced once during the most fertile part of their reproductive cycle and again during a non-fertile time. The videos were transformed so that only the outline of each woman’s body was visible. This was in order to remove all visual cues other than movement.