I wore bird poop to my Senior Prom! Damn thing had eaten blueberries, too. Luckily, we were leaving a friends house, turned around and went back and his Mom was able to get the blueberry poop off of my pastel pink dress.
When I told my Aunt about it, she told me that a bird pooping on you is GOOD luck!
I have had a pretty good life, so I guess she was right!