"Jer, we do NOT need to buy 800 pieces of candy. We only had about 100 trick-or-treaters last year, remember?"
"Listen, I'm not letting our house get egged because you're too cheap to invest in a bag of Snickers."
"WE STILL HAVE SNICKERS LEFT OVER FROM LAST HALLOWEEN!"
"If we don't get them now, I'll just come back on my own tomorrow without you."
"Fine. ... But what do you want to bet that we won't even see the bottom of the candy bucket after all the kids have come and gone?"
(After giving it much thought.) "If I'm right, I get to buy this crazy mummy guy. The CANDY goes in his HEAD!"
"And if I'm right, I get to dictate the amount of candy we buy next year. No questions asked."
(Five minutes later) "Yeah, I can't wait to buy 10 thousand pieces of candy next year for the mummy's head. It's gonna be awesome."