David sits on the couch eating Chinese food.
Me: "Can I have a bite?"
He reluctantly hands me his plate and says: "If you were hungry you should have ordered something."
Me: "Never mind, I don't want any."
David: "No, here, have a bite."
Me: "No, you're not generous."
David: "Have a bite!"
Me: "I'm generous, but you're not."
David: "I don't care."
I give in and take a bite.
Me: "I would say 'Thank you,' but I'm not grateful. You're not generous and I'm not grateful."