Why Do 'Teen Mom' Stars Keep Getting Pregnant?

Kailyn Lowry just announced that she is pregnant again. Meanwhile, Adam Lind—father of Chelsea Houska's daughter and author of the worst text message in the world—has reportedly knocked up another young woman whom he is no longer dating. (Although it would be hard for him to date anyone right now, since he just started … » 3/26/13 6:00pm 3/26/13 6:00pm