Pornographic video clips already showing up on Twitter's Vine

 Less than a week after Twitter unveiled Vine, the video-sharing app apparently has developed a porn problem.

Released Thursday, the app for iPhone and iPod Touch lets anyone create and share six-second clips, but it also has become a popular venue for male genitalia and pornographic movies taped off TVs and laptops. As first pointed out last night by The New York Times' Nick Bilton, searches for #porn, #sex, and other associated tags brings up a handful of videos featuring male exhibitionism and other activity.