Behind the bouquets of roses and candy hearts are years of history behind these Valentine's Day facts.

5. One theory for the origin of Valentine's Day was secret marriages in Rome​.

One theory for the origin of Valentine's Day was in Ancient Rome, when Emperor Claudius II made it illegal for men to marry, as he claimed single men made better soldiers. Apparently, St. Valentine performed secret marriages, for which he was executed on February 14th.