The difference is the "alarm clock" refers to the oft-too-rapidly approaching date of menopause. You on the other hand, as a guy, have no "expiration date".
But does that necessarily mean it's impossible for a guy to have the same reaction to hormones as a woman does, or does it just mean that when he does there's no biological logic to it?
edit: That said, while we may not have menopause, we do still have death in our future, so I guess it would still make biological sense, just as much as deriving pleasure from sex does.
Given that we have less energy as we get older, the risk of birth defects goes up with older fathers and we only live so long I would be surprised if there was an evolutionary advantage to men not feeling an urgent desire to raise children.
