The Catholic Church recognizes at least three different saints named Valentine or Valentinus, all of whom were martyred. One legend contends that Valentine was a priest who served during the third century in Rome. When Emperor Claudius II decided that single men made better soldiers than those with wives and families, he outlawed marriage for young men. Valentine, realizing the injustice of the decree, defied Claudius and continued to perform marriages for young lovers in secret. When Valentine's actions were discovered, Claudius ordered that he be put to death.
Other stories suggest that Valentine may have been killed for attempting to help Christians escape harsh Roman prisons, where they were often beaten and tortured.
Valentine greetings were popular as far back as the Middle Ages, though written Valentine's did not begin to appear until after 1400. The oldest known valentine still in existence today was a poem written in 1415 by Charles, Duke of Orleans, to his wife while he was imprisoned in the Tower of London following his capture at the Battle of Agincourt
- Hispanics: 153 men per 100 women
- Asians (single race): 132 men per 100 women (This ratio is not significantly different from that for Hispanics or non-Hispanic whites.)
- Non-Hispanic whites (single race): 120 men per 100 women
- Blacks (single race): 92 men per 100 women (The numbers of black men and women in this age group are not significantly different from one another.
- Hispanics: 38 men per 100 women
- Non-Hispanic whites (single race): 33 men per 100 women
- Blacks (single race): 33 men per 100 women
- Asians (single race): 28 men per 100 women