Related:

• A boy without mischief is like a bowling ball without a liquid center.
  -- Homer in "Tell-Tale Head", from The Simpso...
• A boy without mischief is like a bowling ball without a liquid center.
  -- Homer Simpson Lisa the Greek...
• Bart: I was wondering. How important is it to be popular?
  Homer: I'm glad you asked, son. Being popular is the most important thing in the world!...
• Homer: [reading The Bowl Earth Catalog] Wow, look at these bowling balls, Maggie!
  Can you think of a better way for Daddy to spend his hard-won fifty bucks?...
• Homer: Ooh, look at this one! The Hammer of Thor! (Reading) "It will send your pins to .
  .. Valhalla?" Lisa? Lisa: Valhalla is where vikings go when they die....
• Homer: Ooh, look at this one! The Hammer of Thor! It will sends your pins to.
  .. Valhalla? Lisa? Lisa: Valhalla is where Vikings go when they die....
• As sharp as a marble / bowling ball / beachball / pin head / bowl
• Homer: [voice-over] The next few weeks at my dream job were like a wonderful waking coma.
  [Homer turns the balls so all finger holes point the same way] [everyone walking by says, "Hi Homer!...
• Bart: So, like sometimes you can do stuff that you think is pretty bad so other kids will like you better?
  Homer: You're not talking about killing anyone, are you? The Telltale Head...