Sean Penn appears to be flip-flopping when it comes to wearing his wedding ring. The actor, 61, looked downcast when he was spotted on Saturday at a private home dressed to the nines in a tux sans his wedding band – a stark contrast from a luncheon earlier in the day in which he was seen wearing the band. Both outings came just one day after his third wife, actress Leila George, 29, filed for divorce from the "Gangster Squad" performer a year after telling him "I do." In August, Penn, 61,