Sunday night's episode of "Watch What Happens Live" was dedicated to host's Andy Cohen's 50th birthday. Co-hosted by Cohen's close friend, rock musician John Mayer, the two reminisced about getting high and celebrity friends.

"You can only have one for the rest of your life: weed, oral sex or cheese," Mayer stated to Cohen. A demand from an audience member Cohen found particularly difficult.

"I love cheese, but I'm taking it off the list," Cohen replied.

"I would stick with oral-sex. Yeah, I think that's true. Yeah, I would find another vice."

When it came time for Cohen to divulge the most exciting person he smoked pot with a certain novelist was on the tip of his tongue.

"Well, you and I smoked pot with George R. R. Martin recently," Cohen reminded Mayer, before rounding out the list with a few more impressive names.

"My pot list is so amazing," said Cohen. "How's this: Willie Nelson, Snoop Dogg, George R. R. Martin, Bob Weir."

"Is there anyone else on the Mount Everest of people to smoke pot with?"

"Barack [Obama]! Barack would be the one."