But Why Is It Purple?

Girl #1: Look at that guy!
Girl #2: Which one?
Girl #1: The one with the white thong!
Girl #2: [80-year-old guy bends over to pick up shell.] Look! The thong's not white there!
Girl #1: Ewwwwwwwwwwwwwwwwwwwwwww!

--Daytona Beach, Florida