Friday's Google Doodle celebrates Valentine's Day. The artwork shows a variety of yummy-looking chocolates in pink wrappers with "Google" spelled out in icing on the tops of treats. Chocolate is the traditional treat given in the United States to loved ones in honor of the winter holiday on Feb.

Today, we might celebrate it by making goo-goo eyes at our partners over a bottle of wine, a plate of spaghetti and a bouquet of roses, but ancient Romans celebrated the day with a fertility festival hundreds of years ago with animal sacrifices and drunken merrymaking.