The copy of Fifty Shades of Grey you hope doesn’t belong to your mom.

Well, here's the good news: unless you're Tumblr user All Hail Pizza this copy of the widly popular S&M smut novel Fifty Shades of Grey doesn't belong to your dear and obviously nymphomanical mother. The bad news though is that this book has sold more than 40 million copies, which means that whether she's bookmarked it or not, mathematically speaking, there's a good chance your mom has used it for a masturbatory fantasy when we're not around to have our way with her. So be ye warned: you might not want to touch her copy unless you're wearing gloves.