The guy even asked the girl "How come you never look at me in the eye? I looked at him after that but it just makes me so uncomfortable to look at him straight on.
Staring directly into someone’s eyes causes an arousal reaction.
Being stared at by a stranger who appears large or ominous can be seen as a threat and elicit a fear response. A direct stare from a human to a dog or an ape can be interpreted as a threat from the large (and strange) human. Psychologist Paul Ekman has distinguished between smiles that represent genuine happiness (“Duchenne” smiles) and fake smiles that might be used to feign happiness, or cover some other emotion.
However, the gaze of a potential sexual partner causes arousal that can be interpreted positively—as a sexual invitation. The key to telling a fake smile from a real one is in the eyes.
When forming real smiles, the eyes narrow and create lines, or “crow’s feet,” at the outer corners. Pupil Dilation is a Sign of Interest (and It Can Make You Sexy).
When we are interested in something or someone our pupils will dilate.
In one study, a woman’s eyes were altered to make her pupils look dilated. Research on love and attraction has found that mutual gaze—staring into each other’s eyes—is a good predictor of two individuals being “in love.” 5.The exact same photos of the woman with dilated eyes was rated as more attractive than those with normal-size pupils. Eye Contact is a Valid Cue to Deception, But Not in the Way That You Think.Everyone assumes that a liar won’t look you in the eye, but research on the nonverbal cues associated with deception suggests that a liar engages in eye contact than a truth-teller.The explanation is that the deceiver goes the extra mile to try to convince you of his or her veracity and so “overdoes” the eye contact in order to appear truthful.Read more about nonverbal communication and your ability to master nonverbal cues here. Body language is a kind of nonverbal communication, where thoughts, intentions, or feelings are expressed by physical behaviors, such as facial expressions, body posture, gestures, eye movement, touch and the use of space.