male pattern baldness

Some Random Speculation.Is male pattern baldness an evolutionary adaptation? It occurred to me that male pattern baldness may have actually had utility of sorts to our hunter gatherer ancestors. Given that the human sex drive outlasts his physical prime, baldness in males may have been a mechanism for reducing the attractiveness of older males and therefore steering them away from contesting more desirable females with younger stronger males. Avoiding such confrontations would have definite survival value and make it possible for the aging male to continue reproducing with females further down the desirability ladder in his declining years....Just a thought.