Charlie Sheen doesn’t exactly have a reputation as Prince Charming. But long before the thrice-divorced bad boy pleaded guilty to domestic assault, before he spent milllions a year on prostitutes, and before he simultaneously lived with two porn stars he called “the goddesses,” he was “Mr. Big” to Punky Brewster star Soleil Moon Frye. In her Hulu documentary, Kid 90, Soleil, fondly recalls having her first “consensual sexual experience” with her longtime crush, Charlie, in 1994 — when she was 18 and he was 29. “He was really kind to me and treated me really beautifully,” Soleil, 44, says. “In some of the most pivotal moments in my life, he has checked in and [lent] his support.” Charlie, 55, seems to appreciate having someone vouch for him for once. “She’s…