If it last just four seconds, he may not be all that impressed. But if it breaks the 8.2 second barrier, he could already be in love they say.
Hidden cameras were used to secretly track the eye movements of 115 students as they spoke to actors and actresses. They were then asked to rate their conversation partner's attractiveness.
The men looked into the eyes of actresses they considered beautiful for an average of 8.2 seconds, but that dropped to 4.5 seconds when gazing at those they rated less attractive, the journal Archives of Sexual Behavior reported. The researchers believe that men use eye contact to seek out fit and fertile mates.