"Of course that didn't work out, but hey, at least the moment was one for the books."
Here's what I think is brilliant. This isn't absolutely original. I've heard a similar joke of it from this amazing stand up comedian, Russell Peters, and it had just stayed to me until it revealed itself quite useful right at the moment when I needed it.
Situation: I sleep at the top bed, while younger bro sleeps at the bottom bed.
Problem: I wanted to switch beds with him. There's a gleam of possibility that he'll allow me to.
Me: Hey can we switch beds?
So out of desperation and a bit of inspiration from Russell Peters I finally argued:
Me: They say that mature people aren't afraid of change. Be mature. Choose change.
Of course that didn't work out, but hey, at least the moment was one for the books.