What do porn stars do when their lives in the adult film industry end? That’s the question at the heart of documentary filmmaker Bryce Wagoner’s film “After Porn Ends,” and its new follow-up, “After Porn Ends 2.” The film looks at the tragedies and successes of people who left an industry that famously uses up young talent. Some have no regrets about their years in the industry. For others, a career in the adult industry has proven to be a conduit to certain despair. Johnnie Keyes: Johnnie wasn’t the first black adult performer, but he was the first black Porn Star.