Mr. Peacock decoupaged his ceiling and it looks pretty cool! He made black and white xerox copies from a book, cut them out, glued them to the ceiling, and then did a wash of decoupage to seal it. Says Mr. Peacock:
People ooh and ahh when they step into our home for the first time and notice the glorious “birds and bees” on the ceiling. It also adds some depth to the ceiling and makes the space feel taller.
Apparently, if you get tired of it, the decoupage is easy to remove. You just wet them with a towel and scrape them off. I think this is a great idea, especially if you live somewhere with high ceilings.