When in my early twenties I had started dating a young woman who had just turned nineteen and was still a virgin. She was 'saving' herself for the right time, but liked to masturbate. I found this out when we first went to the movies together. Halfway through the evening we were heavily into kissing when she grabbed my hand and pushed up her skirt between her legs. Her panties were sopping wet and it wasn't long before I brought her to orgasm. She reciprocated by putting my jacket over my lap and bringing me off into her hand.
This started a two month period where we would bring each other off in all sorts of places. In the car whilst parked up in some dark street, in the woods, at a country park, in the toilets of a nightclub, on a secluded beach, the changing rooms at a swimming pool, etc. She seemed to get off on the thrill of doing it where you might get caught. Needless to say when we did get caught by a security guard shining his torch through the car windscreen when we were parked on the outskirts of an industrial estate one night, it kind of put an end to our exploits. We ended up going our seperate ways not long after that.