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Michael Rosen and Dr Laura Wright are back with a new series of Word of Mouth, and appropriately enough they're starting with Hellos. And greetings. Former diplomat Andy Scott has greeted people in more than 60 countries, and he's written a book about his experiences called One Kiss or Two? The origins and psychology of greetings provide a rich subject and by the end of the programme they may all even reach an agreement about how many times to kiss.. Producer Beth O'Dea.