This is a serious practical question. Should you just scratch the itch? Or should you bear the discomfort, analysing the sensation, breaking it into its component parts, noting that the itch is impermanent, etc. until it goes away, all the while presenting a calm and stoical facial expression to the world?
I'm asking because I can't imagine the Buddha or some other advanced meditator scratching. But I wonder if the average person is allowed some greater leeway.