Sex partners: how old is too old?

recently had a birthday, which is just one more reminder that my age is quickly climbing and there's no stopping it.  I've discovered recently that as I age, I'm increasingly becoming attracted to older men.  By older I mean a little gray here and there; I'm not ready to start scouting old folks homes for sugar daddies.  But, this revelation brought up a few questions for me. Does your age redefine how old is too old? Does our taste in sexual partners constantly evolve to fit our needs? Will I still appreciate a younger 20-something man the older I get, or will I increasingly find myself drawn to the more experienced, grownup sort of fellow? I don't have a specific age range when looking for potential sex partners. But surely there's a limit to how old is too old; I just haven't discovered that magic number yet, if there is such a thing.

I encountered a couple at a swingers club a few years ago who were clearly in their 70s.  They stood peering through the window of a bedroom, watching the