There's no doubt been doctorate theses written on the subject of how a well placed fck word can elevate a sentence from the everyday to the spectacular. This is especially the case where it comes in an unexpected place or from an unexpected person. Liam Gallagher isn't going to make you sit up and listen when he swears, but I bet you'd pay attention if the sweet little old lady in the corner shop said to you, 'Are you going to buy that fcking chewing gum or not?'