As featured in New York Best Selling Novel, Fifty Shades of Grey. Considering starting an anal sex practice? Do not even think about putting anything in your backend without first having a go on the Flex Anal Bead vibrator. This flexible, waterproof pink bead strand and vibe set is the perfect way to start out on the path to anal ecstasy. The pliable wand bends and conforms to the contours of your body, while the vibrator delivers, gentle, yet orgasmic behind buzzing!