The movie Fifty Shades of Grey is considerably better written than the book. It is also sort of classy-looking, in a generic, TV-ad-for-bath-oil way. Dakota Johnson, who plays the virgin English-literature major Anastasia Steele, and Jamie Dornan, who plays Christian Grey, the wildly rich and sexually particular business titan who wants Miss Steele in his playroom, are exceedingly attractive actors with enviably supple bodies well suited to nakedness. And really, under the circumstances, movable parts matter more than acting skills.