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You should resist scratching the burned areas and avoid tight-fitting clothes.

With surreal films like Blue Velvet and his mind-bending TV series Twin Peaks, David Lynch often left audiences scratching their heads.

"That's pointing towards the idea that they're 'scratching an itch' - that it has a function in skin health," said Prof Croft.

At the same time in the Town House recording studio in west London, the members of Pulp were scratching their heads at what to do with their latest song.

The outside enclosure includes long grass, trees and furniture for climbing and scratching posts.