Producers no doubt claim they're responding to what's in demand. But the rest of the truth is, their decisions are a factor in creating the demand. They help define what we see as desirable.

And it's a damn shame. I recently watched Diane Keaton star opposite Morgan Freeman in "Five Flights Up," and I'm going to be watching Redford and Fonda soon in "Our Souls at Night." Great actors who smolder with personality and sexuality, like Susan Sarandon, remind us all that sex improves with age.

That said, I think Robbie was the right choice in "Wolf," because her youth highlighted the immaturity of DiCaprio's character. And Murray's lonely character in "Lost in Translation" enjoys the company and flirtation with a younger woman (also lonely) but has the maturity not to take the matter further.