SAN FRANCISCO, Calif., Apr. 21, 2015 / PRNewswire CRAVE, an emerging leader in modern adult toy design, is taking crowdfunding in a new direction with its latest release, Flex. Following the record-breaking Tilt campaign for Vesper, an award-winning vibrator necklace, CRAVE is delighted to make both the Flex Programmable series and the Flex Greatest Hits…