The third couple's question dealt with how to celebrate their marriage.
Francis said the key thing was not to have a wild party, though the celebration is important, but to feel the presence of Jesus. The dress, flowers and food are important, but only if the couple are there in a true spirit of love, he said.
St. Valentine was a third-century Roman priest who is widely believed to have been martyred on Feb. 14 for his beliefs. He has since become the patron saint of love and engaged couples.