Friday night, I promised my two young sons that when we woke up, while their mom was on a road trip, I'd cook breakfast. Both, but particularly my youger one, a kindergartner, said they wanted omelettes.
This was great, because I also wanted an omelette. We would have a great breakfast with cool stuff in our omelettes.
The next morning, my kindergartner announced that he wanted a waffle. I asked him, "Don't you want an omelette?"
He responded that he did not want an omelette. He wanted a waffle. So when I asked him if he had changed his mind, and reminded him that he'd said omelette the night before, he agreed. He'd changed his mind.
It then struck me.
One time a politician said he wanted an omelette. But when it came time to placing the order, he asked for a waffle instead.
This is the likely origin of someone changing their mind when it comes down to time to commit. This is why someone changing their mind at commitment time is referred to as "waffling".
Well at least that's the theory Sammy and I came up with yesterday.