Me: "Is that even legal? I didn't know you could give half of your liver to someone who needs it."

Jon: "I didn't either, but I guess that's why they say the liver is so magical."

Me: "I'd give you half of my liver if you needed it."

Jon: "I'd give you half of my liver, too."

Me: "I'd even give you a kidney if you needed it."

Jon: "I'd give you half of my liver and a kidney."

Me: "I'd give you both of my kidneys."

Jon: "I'd give you both of my kidneys and then steal two from somebody else and give you those, too."

(... long pause ...)

Me: "But I wouldn't need four kidneys."

Jon: "No, but you'd have options."