Sushi

Isaac:  “I wish I had one of those diving suits and could go real deep!”

Richard: “You can when you get older.  Did you know you can dive pretty deep without a suit or scuba or anything?”

Isaac: “Really?”

Richard:  “Yep.  Before my ear blew out I could do 20 feet.  But that’s nothing, I once saw my friend Ed go 40 feet.”

Isaac: “Without a suit or anything?”

Richard: “Yep.”

Isaac: “Did he take a knife?  He could have brought you sushi!”