When I was 16 I had an accident. I thought I would make it home from the bus to use the bathroom. I didn't make it.
I found a small worded area and ducked into it. I remember yanking my tights and knickers down and the utter relief as in peed.
Then, for no accountable reason, I started to masturbate as I squatted. The orgasm was electrifying and from that I learned that jilling outdoors really does it for me.
Two days later, I was in my little wood but this time i wasn't alone, although I didnt know it at the time. I peed, then Jilled off. I was getting there when I heard a couple of girls voices....'dirty fucking bitch' I was being watched by two girls from the riding stables. I immediately popped the biggest orgasm of my life.
So, for me, one of my favourite methods is to do it in a place where I might be caught.....even better is if I do it somewhere where, if I am caught, I will be verbally abused!
I did it in a shop changing room, got caught and was hauled into the managers office. He was clearly turned on by it, but wanted to avoid the adverse publicity I told him I would make certain his store got if he called the police. Instead, and remember, I was 18 when this happened, he contented himself with yelling at me, and trying to reduce me to years by calling me all the dirty names he could think of. All it did was make me cum in my knickers as he got to the point where he called me a 'dirty fucking cunt.' I had been almost right there when I got busted, and this just tripped me over nicely.
So, public, exposure, humiliation. Well, it takes all sorts, and it does it for me.