We had an amazing experience one afternoon in Paris. We we walking around Montmartre and spotted the Museum of Erotica. Musée l'erotisime.
http://www.musee-erotisme.com Well, we had to take a look. Inside were six floors of exhibits; all very explicit but displayed in a tasteful, museum way. We wandered up the stairs, each floor having a different theme. On the top floor were contemporary drawings and photographs. We were getting ready to leave when a man dressed in a leather outfit appeared (we were the only two customers on that floor at the time). He said "would you like to see me to do a strip tease" with a heavy French accent. "Of course" we said. He took a chair, shaped like a giant high-heel shoe, and placed it in the corner. He sat my wife on the chair, positioned me next to her, standing. Then he faced her and started to do a slow dance. He took her hand and put it on his pants where she was encouraged to rub his rather large and hard cock.
You guessed it, she did. And with some enthusiasm.
Now other people were coming up the stairs.
He unzipped his pants and slid them down. She stroked him as he danced. Then he pulled her shirt up and pulled down her bra and moved in close so that he could rub himself against her breasts.
People now were watching with great interest. Including me.
He pulled her to her feet and they kissed for a time. Then he whispered in her ear, "I think now you should suck your man".
So, I sat in the chair, my wife kneeled in front of me and our French man stood behind her, his cock on her back and his hands on her breasts. She sucked me as people gazed on with interest. One couple came up the stairs, took a look, and then headed back down. But the rest stayed, not knowing exactly what to do.
After a few minutes I came and the mrs. swallowed it all (we were in a museum after all).
It was one of those unexpected, and wonderfully spontaneous events.
Ahhhhhh Paris.