I seem to recall that there is a typical pattern of hearing loss as one ages - (general pattern that is - as with most things there is a range - and of course it can also be influenced by genetics, environment, etc) - and I also seem to recall that the pattern is different for men vs women - I'll have to see if I can locate anything about that.

I wonder is there is some "hardwired" differences as well - perhaps for men to prefer women's voices - women to prefer mens...