The first Christmas after Roger and I got married, I talked him into opening all of our presents at midnight on Christmas Eve instead of waiting until Christmas morning.
For many years I had lobbied my parents to at least let us each open one present on Christmas Eve. They sure were sticklers about making us wait until Christmas morning. So when I realized that the only person I had to convince that first Christmas together was Roger, who was pretty ambivalent about the idea, I went for it.
It was fun!
Then Christmas morning. Meh.
I learned my lesson. We have never done that again. Except we did start our own family tradition of opening one present each on Christmas Eve. The rest have to wait.