While chocolate hearts, cherubic angels with bows and Hallmark cards have nothing to do with the history of St Valentine, they are a bit more light-hearted than the imprisonment and torture of a man in Rome. So rather than condemning the unbridled commercialisation of love (and martyrdom), let’s celebrate some of the good ideas and be thankful that we don’t have to endure the annual retelling of the horror that befell a random historical figure.