It turns me on to have my wife do little public nude dares, especially if someone sees her naked. The kink is called candaulism. She’s 30, tall and very slender.
This one time, we went to the county fair and had a great time. The parking lot for the fairgrounds was enormous and going during a weekday afternoon meant plenty of open space. We parked a little farther away than most cars. I had this idea that she should get naked in the car, lay down across the back seat and touch herself until she came. She really liked this idea as she stripped in the front seat so quickly before shuffling to the back seat with nothing to cover herself with. I stood outside with a cigarette, and with all the windows open, she started touching and fingering herself in the back seat. With her laying down, she wasn’t directly visible below the doors, but her feet were up on the headrests of the front and back seats, open and displaying herself to me and the sunlight.