Ashley: Daddy, roll down the windows – Dillan farted.
Dillan: I did not! Besides, the smeller is the feller.
Ashley: The feller is never the smeller – but only sometimes.
Dave: What? I’m confused. The smeller is never the feller – but only sometimes?
Ashley: Right.
Dave: So … are you saying when you’re the smeller you’re not the feller, but if someone else is the smeller they are the feller?
Ashley: You are correct.
Dave: Ah! I understand now.