This is not the wildest story but it turned me on. My wife and I have history of swinging, nudism, wild motorcycle rallies etc. etc. but she is usually not out showing off in the general public. She has done some wild stuff in charged environments. We have a neighbourhood bar that we visit once a week and we have made friends with several regulars. We have a favourite bartender (S) that we have been following around for several years. She is an outspoken, dirty talking, tatted up wild child. And she is very popular. She is my free pass and she is bi. My wife isn’t really bi but is pretty into her. S loves my wife’s tits and gropes them all the time. So night before last we were at the bar and it was a slow night. S decided that it was a good idea to put her autograph on my arm. My wife saw what S was doing and joking complained that she was not getting an autograph. S looked at her and said I’m gonna put one on your titties. I laughed and didn’t think much of it. I got distracted by something and looked away briefly. When I turned back S was coming around the bar with the marker in her hand. Right there in front of our friends and a few people we do not know, my wife whipped out her left tit for anyone to see and sat there while S autographed her pierced nipple. I was shocked but very aroused that everyone was staring. I made sure to let my wife know that I was very pleased with what happened and had a great time when we got home.