It was an episode of the Love Chronicles dealing with the concept of May-December romances, and couples where one spouse was many years older than the other.
Personally, I'm not looking for a mate much younger or older than I am, but the views expressed here were interesting. While I didn't find any of the younger brides/significant others attractive in the least, it gave reassurance that if I get to an advanced age and then find a companion much younger than I am, I won't be a freak. Turns out there may even be genetic reasons for it...