Practically everyone in the English-speaking world knows about Valentine's Day. Celebrants buy more chocolates, flowers and jewellery on 14 February than on any other day of the year and only Christmas occasions more greeting cards.
Catholics still regard Valentine as the patron saint of engaged couples; happy marriages; love; and lovers. Yet a patron saint of love and lovers is not exactly compatible with Christian doctrine, which has always emphasised the joys of self-denial. Celibacy has been a requirement for priesthood since the Middle Ages, and virginity won sainthood for hundreds of women. Therefore, a saint who sponsors the exchange of candy and kisses between lovers seems doctrinally dubious. So where did this saint come from and how did he become the impresario of sweethearts?