In 1960 an interesting theory was approved by the Kennedy – Nixon debate.
The scientific phenomenon of the confirmation bias suggests that we look for information which confirms our hypothesis, and ignore falsifying information relationship between events that doesn’t exist.
In the example of the Kennedy – Nixon debate this means that people who watched the debate on television were biased by Kennedy’s more appealing appearance and as they wanted him to win they started focusing on his positive points. The radio listeners, in contrast, for the most part considered Nixon to be the winner of the debate.
Even if our inner idealists want to deny the following fact, this case again shows, how important our appearance (with hair being a major part of it) is in making a statement and influencing others.