marriage breaks up after five years, were his supermodel wife's racy pictures too much for camp David Walliams?

Even by the louche so-called standards of the fashion industry, they are the most arresting of images. Supermodel Lara Stone, instantly recognisable with her gap teeth and pale blonde beauty, grapples admiringly with pop singer Justin Bieber, 20.

The Calvin Klein campaign — which features both of them partly naked and exhibiting an apparently molten mutual sexual desire — rolled out in January this year all over billboards, glossy magazines and in a filmed advert, too.

He squeezes her thigh, and lies on top of her. She slips her hands into his jeans, slack-jawed with arousal — or at least a simulation of it.