Knuckles Out

Jack: My cousin told me that when you have your knuckles out, that you have to eat really cold food.

Me: When you have your knuckles out? (I didn't even touch on the fact that he doesn't have any cousins....)

Jack: Yes, when you have your knuckles out, you have to eat really cold food.

Me: Jack, I'm confused - what are you talking about?

Jack: When you have your knuckles out, you have to eat really cold and soft food for a long time.

Me: Oh, do you mean when you have your tonsils out?

Jack: Oh, yes, tonsils!!