10/09/2014 10:09 am ET Updated Oct 09, 2014

Anderson Cooper Jokes That His Mom 'Hooked Up With' Her Fair Share Of Hollywood Men

We've heard Anderson Cooper talk about his mother, Gloria Vanderbilt, but never quite like this.

Cooper spoke candidly with David Letterman on Wednesday night about all the guys his mother had "hooked up with" in Hollywood. Which, apparently, turns out to be a lot of guys.

"Watching old movies with my mom is a trip," Cooper said. "I'm like nervously eating popcorn like, 'Did you know the third dancer on the right?'"

To which Letterman had the perfect response: "My mom hooked up with Harry Truman."

H/T Mediaite