My wife and I enjoy attending motorcycle rallies several times a year. She seldom drinks alcohol and is normally pretty conservative however I can talk her into flashing her tits at the rallies once in a while if she has had a few beers.
Last summer while camping at a rally we stopped by a campsite to visit with a couple of guys we met earlier in the day. After a few beers we talked my wife into flashing a few of the bikers as they rode by. Her inhibitions were lowered enough she was enjoying herself as much as we were enjoying the show. We visited a while longer then headed back to our campsite.