Get in the mood for love with interesting facts about the sweetest holiday by Kathleen Davis Why are red roses so popular? How many candy hearts are produced every year? And most important, how many single men are actually out there? Love it or hate it, Valentine's Day is just around the corner. Whether you're steadfastly single or joyfully coupled up, chances are you have a thing or two to learn about love. Read on for surprising stats and unexpected info about the holiday.