When I was 34 I did the wildest sexual thing of my life... and it was done in public.
When I moved to Hawaii from Tokyo, I was single. I was living in a Waikiki high-rise condo. My building was full of "snowbirds" with long-term vacation rentals and time-share tourists. One day I saw a Japanese woman lounging by the pool. Likely a Japanese citizen not a local girl, based on her look and general way of moving and acting. So, I struck up a conversation in Japanese and learned that she was divorced, living with two very young sons and working (illegally) in Honolulu. Her boys were in school, so she was enjoying some private time by the pool.
Her name was Shinko and she was truly tiny. She was under five-feet tall and may have weighed 90 lbs. She confessed almost immediately that working two jobs around her boys' school schedules combined with the responsibilities of motherhood, left her almost no time for herself, and that she really missed sex. That was an unusually forward admission for a Japanese woman.
I replied, "I can help you with that if you want," in a joking way. She said, "I'm free right now". So, we left the pool and went back to my apartment for her much-needed fuck. We both enjoyed it so much that it became a regular thing whenever she had time off without her kids. She was very polite about it, she would always call me first to ask if she could come over. I rarely said no. In fact I never said "no" unless I had some other woman there when she called.
She was so small that the best position for her was to ride me. Any other position felt like I was smothering or crushing her, but she didn't seem to mind. To fuck her doggie style she knelt on my bed and I stood behind her. That became the way I usually came in her, after she rode my face and my cock for a couple of orgasms of her own. And she came hard again every time I did. She was insatiable.
She knew I was "dating" a local "girlfriend" who worked at an ad agency that often gave me freelance work. I would see my GF on some evenings and every weekends. We always met and slept at her place, so she knew nothing of Shinko.
So, Shinko and I became day-time fuck buddies as her schedule permitted. I was working from home as a freelancer so I could meet any time she wanted on weekdays. I never requested sex from her, I just waited for her calls. Those typically came about twice a week. When she arrived we went directly to bed and she would cum at least half a dozen times before I did. The sex was better with Shinko than with my GF, but we had little to talk about. And Shinko started asking for very specific naughty things she had thought up between visits.
For example, she liked to straddle my face or cock elevated just above contact while masturbating until she started to cum. At the point her orgasm started, she would promptly drop her pussy down onto my mouth (or cock) at the very moment she came and finish with throbbing pussy moaning loudly. She told me she often masturbated with this same fantasy between her visits to my place. And fucking me furthered her imagination when she was alone. I almost always finished doggie style or in her mouth. She loved swallowing my cum and often asked for it instead of doggie.
One day she told me that she took taxi the night before and the driver asked if she would like to attend an underground sex show. He assumed she was a Japanese tourist. He told her "he knew Japanese enjoy these underground (and illegal) shows". While not all of them do of course, but they were the only audience for these shows.
These secret performances only let Japanese nationals attend because the performers correctly believed Japanese visitors would be well behaved and never inform the police of what they had seen. The taxi drivers got commissions for delivering guests to these shows. Shinko said "no thank you" for the offer but then asked me if I would join her at such a show.