Long Hair - Psychological Significance

Psychological Significance

Anthropologists speculate that the functional significance of long head hair may be adornment, a by-product of secondary natural selection once other androgenic/somatic hair (body hair) had largely been lost. Another possibility is that long head hair is a result of Fisherian runaway sexual selection, where long lustrous hair is a visible marker for a healthy individual. For some groups or individuals, however, short hair is the selected trait.

By seven to nine months, infants can tell the sexes apart based on hair length, voice pitch and faces.