A must, then, for anyone looking to win back the love of their adolescent daughters. But if you are after something of a more adult nature, prepare for disappointment. "Some of the requests we have had for Valentine's Day covers have been rather, er, surprising," says Kevin Murtagh, of personalisation service E-Comeleon. "Unfortunately, we can't use them. We vet every image and we're bound by common decency laws." Whatever those may be.