Jerry Seinfeld is taking aim at the popular sitcom "Friends."Earlier this week at the Netflix Is a Joke Festival in Los Angeles, the "Seinfeld" creator took a not-so-subtle jab at "Friends," joking that the network essentially recycled his hit show — just with a more attractive cast."Here’s my theory on ‘Friends,’" Seinfeld told the crowd at the Greek Theatre, according to The Hollywood Reporter. "My show came on — ’89, ’90. ‘Friends’ came on a …