"The secret of making oneself attractive to someone is simply to smile and look them straight in the eye, scientists said [in November 2007]. In tests, researchers found that a direct, smiling gaze from a possible mate made that person appear up to eight times more desirable. The findings from the team at the universities of Aberdeen and Stirling suggest that the 'look of love' may have more to do with the facial expression than with physical beauty... [However] it is likely that holding this stare for too long would be perceived as unattractive -- creepy even."