It was when i went shopping in town and had to call at the public toilets. Whilst sitting there in a cubicle with my lace knickers around my knees , i decided i needed to wank myself offf. What i didnt know was that a guy in the next cubicle was looking over the top of the cubicle watching me, it was only by chance i looked up and saw him, but by then i though what the heck and just carried on, he whispered down what nice knickers i had got on, this really turned me on and he watched as i shot my load into the knickers. | 
