well its up to them really and i guess it can have to do with culture fashion etc
tv and adverts for years have pushed the full head of hair look as being manly to sell products,
my grandad used to do comb over, he had a pot of 'ohbejoyful' in the bathroom to stick it down and every time the wind blew it was like a yacht sail had gone up, soon as he shaved it off it look way cooler.
the yul brinners and telly savalas were quite a novelty back then. (but by 'eck they looked good)
theres something about the bouncer look that is just.....mmmmm
hell it even makes john travolta look apealing in a rufty tufty sorta way.
men who have a full mop of hair sometimes look just as good if not better with it graded or gone.