The custom of sending valentines on this day is the revival of an ancient pagan practice, which consisted in boys drawing the names of girls in honor of their goddess, Feruata Juno. To abolish this heathen practice the names of saints were substitued on billets drawn upon this day. The custom has nothing to do with St. Valentine, except that the feast precedes February 15th, the day on which the goddess Feruata Juno was honored in this manner.
Prayer: Grant, we beseech You, O almighty God, that we who celebrate the heavenly birthday of Blessed Valentine, Your Martyr, may be delivered by his intercession from all threatening evils. Amen.
[from Lives of the Saints, Rev. Hugo Hoever, S.O.Cist., PhD]
Yes, we should. But I still get chocolate, right? ;-)
Thanks for posting this Robert.