01/20/2009 05:12 am ET Updated May 25, 2011

Jerry Seinfeld: I Hate Kids' Birthday Parties (VIDEO)

Jerry Seinfeld tried out some new standup on "The Late Show" Friday night before sitting next to David Letterman and delivering a few more humorous rants from a seated position.

After his standup routine that had a large focus on cookies, the father-of-three sat down and told Letterman about kids birthday parties.

"I go to all of them. I hate every single one of them... Do you find other people's kids never look quite right?"

He especially hates pinatas and bouncy castles, on which his daughter apparently broke an arm, and he told Dave exactly why.