I haven’t read 50 Shades of Grey, and have no immediate plans to do so. Nor future plans. In fact, no plans at all. Nothing to do with the content, but having “looked inside” on Amazon the style of writing doesn’t appeal.
If it’s multiple thrashing, cataclysmic, frenzied orgasms, cloven male Spears of Adonis, expensively manicured fingernails and more multiple adjectives than you can shake a Ruffian dildo at, I can heartily recommend “The Shaft of the Ruffian“, currently free on Amazon.
Beware, though, as you might explode publicly, embarrassingly and piercingly into volcanic paroxysms of gut-wrenching underwear-moistening hilarity.