I got the ball rolling on my personal Facebook page, and I invite you to join in. One—of many—that came to mind is that when I was working for Bethenny Frankel and Valerie Harper's cancer diagnosis was a topic, none of the twenty-somethings around me knew who she was.

This in spite of the fact that Bethenny looks like Rhoda's love child.

So who or what have you mentioned to a younger crowd, only to be mortified by the blank looks you received in return?