According to Legend...
According to legend, Valentine was a third-century priest who lived in Rome. While the Roman Emperor Claudius demanded men remain stay single in order to be stronger soldiers for his army, Valentine had a different plan. He performed secret marriages for these men, until he was found out and imprisoned. While he was in jail, legend has it that he healed the daughter of his jailer, and even signed a letter he wrote to her as “Your Valentine.”