Banks are hearting startups these days.

50 Shades of Grey is the first book in a trilogy about the relationship between a recent college graduate, Anastasia Steele, and a "young business magnate," Christian Grey, the former being employed as a sex slave of the latter, who has a room in his apartment called the "Red Room of Pain," where his sadomasichistic directives go down. The books have been dubbed "mommy porn" and are apparently huge among married women over thirty who are using the "tantalizing tale to spice up their sex lives." Naturally, the subject came up last night at a party attended by some billionaires and their wives. Stephen Schwarzman [attended the event] with his wife, Christine Schwarzman, who said she's just finished reading the novel "50 Shades of Grey," which is "definitely not for Steve," who likes the thriller writer Lee Child. While the Blackstone CEO maybe be (allegedly) too good for billionaire BDSM tales, we're pretty sure most of his peers have found themselves unable to put the page-turners down and don't care who knows it. To that end, we've sent out detailed questionaires to top CEO and hedge fund managers to find out how many other "out and proud" readers of erotic literature there are among Wall Street's elite. Apparently Jimmy Cayne went through the trilogy in "less than a week." Bill Cunningham on Borrowed Dresses, Charity Galas, Astor [Bloomberg]