Letterman: 180 looks good on you.
Obama: Thank you.
Letterman: 'Cause that's just about where I am, and I don't look so good at 180.
Obama: No, you know, you look sharp.
Letterman: You haven't seen me naked!
Obama: We're gonna keep it that way.
President Obama appeared on the David Letterman Show, September 19, 2012, where Letterman asked how much the president weighs.