St Valentines day is also the festival of Lupercalia, a Roman version of an ancient purifying and cleansing festival. Lupercus is thought to be the Roman equivalent of Pan and the festival also honoured Lupa the she-wolf that suckled Romulus and Remus in the cave.
“The festival began with the sacrifice by the Luperci (or the flamen dialis) of two male goats and a dog. Next two young patrician Luperci were led to the altar, to be anointed on their foreheads with the sacrificial blood, which was wiped off the bloody knife with wool soaked in milk, after which they were expected to smile and laugh. The sacrificial feast followed, after which the Luperci cut thongs from the skins of the animals, which were called februa, dressed themselves in the skins of the sacrificed goats, in imitation of Lupercus, and ran round the walls of the old Palatine city, the line of which was marked with stones, with the thongs in their hands in two bands, striking the people who crowded near. Girls and young women would line up on their route to receive lashes from these whips. This was supposed to ensure fertility, prevent sterility in women and ease the pains of childbirth.”