OK Vine users, now we know your dirty secret, courtesy of New York Magazine:
David is a 21-year-old guy from London who listens to Kendrick Lamar, obsessively watches the British TV drama Top Boy, and tweets about grades and drugs. Whenever he feels like it, he pulls down his pants, points his phone toward his crotch, and tapes himself masturbating for six seconds. He publishes the results on Vine, a microvideo app dedicated to the quick and easy sharing of Internet catnip: pets acting cute, skateboarders falling down, and — inevitably — porn.
In the first eleven days after David joined Vine, he racked up 47 explicit videos, 50 followers who liked what they saw, and — he says — three women who wanted to meet up with him in real life. Unlike a professional porn star, David never needed to show up on set, ejaculate on cue, or show his face.