I once talked my girlfriend in using a butt plug in public. We went to a bar we knew of that had dark corners and out of the way spots where we likely not to been seen. She lubes it and then puts a condom over the plug and places it in her purse. She wore a skirt and crotchless panties. When we got to the bar we found a spot and started hugging and mauling each other like highschool kids. Eventually we were successful. We were so hot by now we had to leave. She didn't make it too far before the plug fell out but thankfully we were out of the bar by then. We went home and had the wildest anal sex ever.
We have never done this again. We had been drinking when I talked her into doing this and now she claims that's why she did it. I say "Ha". As long as she doesn't quit drinking we'll do it again someday.