This is one of my very favorites... don't know why I haven't thought to post it before!
There were two nude statues standing in an old garden. One was male, and the other female. For a century they stood gazing at eachother, until one day an angel appeared. The angel said, "God has been pleased by what good statues you've been in this garden for the last 100 years. He has sent me to breathe life into you, so that you may satisfy your desire. You have 10 minutes!
The statues jumped down from their pedestals and ran to eachother. They embraced, joined hands and ran off into the bushes, giggling.
After 5 minutes, the two statues emerged from the bushes, glowing with satisfaction. The angel looked at his watch and said, "Wow, you two are fast! You know, you still have 5 minutes, you could, uh, do it again..."
The male statue looked into his counterpart's deep gray eyes and said, "I'd love to sweetie, but I just don't think I'm physically capable of doing it again so soon."
The female statue smiled and said, "No problem, I have an idea - we'll just change positions! This time, you hold the pigeon and I'll poop on it!"