Get ready for some naked time with Dwayne Johnson. Not only did The Rock show his naked butt on HBO's Ballers, but he's doing the same in his and Kevin Hart's new comedy, Central Intelligence. "I remember sitting at the table and the question was, 'Are you going to show your butt in this movie?' and I was like, 'Nah,'" Johnson says. "[But then] Kevin was like, 'Yes. You should.'" Johnson cracked, "It got a little uncomfortable." "I told him, 'The audience that we want wants your butt,'" Hart added. "If they wanted my butt, I would give them my butt. They don't want my butt." In the film, the Johnson...