Andy Cohen and David Letterman's Late Night Summit

It was a late night tête-à-tête this week, when Watch What Happens Live host Andy Cohen paid a visit to The Late Show with David Letterman.

"So now you're in a unique position where on Thursday and Sunday nights you have your own live show on Bravo, and the guests talk about the Housewives show you've seen," Dave teed up.

"We do, we have Housewives, non-Housewives on the show and it's a lot of fun," Andy replied. "It's kind of like a mix between Wayne's World and a Fellini movie, is kind of the best way to describe it."

Andy went on to describe life in the Bravo Clubhouse, and the seemingly unending stream of booze that runs through it. "We had Jerry Seinfeld on last year, and I said to him before the show 'What are you going to drink?' and he said 'I'm drinking coffee,' and I said 'Well that's no fun, I'm drinking whiskey.'" Andy said. "And he said 'Well we're working!' And I said 'Are we working? Is that what we're doing? He said 'Yes, we're working.'"

Calling Andy "the genius behind the Housewives," Dave asked how exactly the Real Housewives train got rolling. "The original, which was 'The Real Housewives of Orange County' came about through a group of women who lived near each other in Orange County, in the same neighborhood, called Coto de Caza, which is a gated community, and we thought when you really look at these women's lives, there was a modern day 'Peyton's Place' thing going on there. Only their hair was quite a bit blonder, and their boobs were quite a bit larger!"

And if any of the 'Housewives shows are your guilty pleasure -- Andy says stop feeling so guilty. "Ya know what, I always look at them as sociology of the rich. It's kind of a slice of life of these people who are living a certain way in certain communities," he said. "Certainly they're entertaining and they're fun to watch. It's like guilt free gossiping, you can watch, you can identify with people, you can like people, don't like others."

Looking back on the visit, Andy called the whole experience "surreal" in his blog, writing, "I can't believe I went on Letterman ... that it happened and I sat there and talked to him and words seemed to come out and then he said something and I said something back. ... He could not have possibly been nicer, and the whole experience was incredibly exciting, and it was just an honor to be there."

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