We have a pear tree on our urban apartment deck. We bought it with wedding present money. And we love it all the same, even if it's never beared fruit. One day, we thought, when we have a yard, we'll plant it with a another one so they can pollinate their little hearts out.
Surprise! After more than 8 years, our tree is sporting its first pear! Just like that. I think someone's been up to some funny business behind our backs.