VALEntine and CARNE VALE or Carnival may have common roots. After the failure by Christian clerics to eradicate this popular pagan festivity, their alternative was to "Christianize" Carnival or LUPERCALIA and to add  Saint Valentine which it is likely never was (it was Bishop Gelasius who dedicated February 15 to Saint Valentine). Perhaps the idea was to soften the untamed festive nature of CARNEVALE during which  "carnality" ruled - CARNEVALE can be seen as a short period of "release" from inhibitions imposed by reason as represented by rational Athena - the emblem of "cold" reason - and sok during Carnival celebrants act as if they "lost their minds" including some who release their venereal instincts ... Carnaval celebrants can get as frenzied as the ancient manic MAENADS did. Clearly, the "loving tender" implications inherent in St. Valetine's Day are contrary to the crude "carne" implicit in "Carnival", formerly known as  BACCHANALIA or DIONYSIA ...  

St. Valentines Day points to CUPID who as  EROS suffered from manic EROTICISM - his erotic psyche was cure from eroticism by the reciptorcated love of Pshyche ... concerning CUPIDITY, the notion is more complex ... perhaps you should determine your own notion and let us know.