he researchers found that the speed daters who approached their partners relative to those who stayed sitting would experience a greater romantic desire and chemistry toward their partners, and were more likely to respond “Yes, I would see this person again” to their partners. In other words, the people who rotated from person to person were less selective than those sitting, regardless of which gender was doing the rotating.

When men rotated, women (the ones sitting) were more selective. But when women did the rotating, men (the ones sitting) were more selective. Nothing else changed in the experiment, so it was the act of doing the approaching (or being approached) that helped determine a person’s selectivity toward their partner.