Lupercalia,

From the Pagan Institutes' Sacred Times, their pagan book of days (http://paganinstitute.org/PIR/sacred_times.html)

"February 14-21
Lupercalia, one of the oldest festivals of Roman religion, in honor of Juno-Lupa, the she-wolf who suckled Romulus and Remus. Two youths are swabbed on the forehead with wool dipped in milk. This was a festival of love. One feature was a lottery in which tokens (original valentine) with the names of single women were drawn by young men. The couples were companions for the week's festivities."
This is just a bit of alternative history today's pseudo-Christian holiday.