WATCH: John Stamos Strips Down for Full House Reunion

01/29/2014 at 02:00 PM EST

A Full House reunion on Wednesday's Good Morning America went from family-friendly to frisky.

TV's favorite band of "brothers," John Stamos, Bob Saget and Dave Coulier, appeared on the morning show to talk about their upcoming Super Bowl commercial for Dannon Oikos. The trio shared their newest spot, which involves Stamos losing his pants after a yogurt snafu, and then Stamos stripped down himself.

Out to prove that his Oikos boxers weren't just for the commercial, the age-defying Stamos eagerly unzipped his pants to reveal he was wearing the undies at that very moment. Have mercy!

Tanner fans were treated to more intimate moments with GMA's behind-the-scenes Tweets, including a Rihanna photobomb.

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