Human evolution theory utilizing concepts of neoteny & female sexual selection
An etiology of neuropsychological disorders such as autism and dyslexia, and the origin of left handedness.
Young women appear to be attractive to young men owing to the combination of paedomorphic and secondary sexual signal characteristics which they present to them initially at a distance. Hairlessness, voice tone, complexion and girlish behavior all have a childlike character that in ethnological terms appear to lower the probability of a male aggressive response of to appease if one is present. These same characteristics are likely to reduce male fear and anxiety on closer approach and to permit sexual expression. The male begins to display in various show-off performances including physical prowess (such as, dancing), exhibitions of virtuosity in the social graces, in demonstrations of charm and sensitive virility. These displays attract the females attention and provide the basis upon which she may choose to respond to or reject the males approach: or more usually, simply fail to observe them. ... From the purely ethological viewpoint this sequence has much in common with courtship in birds and often mammals.... (Sexual selection in the primates (1972) John H. Crook in Sexual selection and the descent of man 1871-1971 Campbell, Bernard (ed.) pp. 274)