If this is right, the longer the beard the more confident the man …

In their 1997 book The Handicap Principle, Israeli physiologist Avishag Zahavi and her evolutionary biologist husband Amotz proposed that beards are a costly signal of male competitive ability, since they can easily be grabbed by rivals during fights. According to this theory, a man with a full beard is advertising his confidence in his own fitness: He thinks he can beat his competitors even with the “handicap” of the beard. [link]

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