I've seen them essentially submit negative bids for things when the task is something desirable. If one wants to put the kids to bed, and the other doesn't, the

I've seen them essentially submit negative bids for things when the task is something desirable. If one wants to put the kids to bed, and the other doesn't, then basically no money is exchanged because both parties agree on who should do it. It's just a much faster way to get to that conclusion than feeling each other out with words. :)