The Simpsons: 21st Season

I can not believe the Simpsons have been on the air for so long. I remember about 15 years ago I had a small dog who barked every time she heard the doorbell ring. I swear every episode of the Simpsons has a doorbell ringing in it. I am pretty sure that is one of the reasons I stopped watching it. I am amazed that a cartoon could run so long. Congratulations to the creators of The Simpsons! This is truly a huge accomplishment.