Today I had a walk-in the city. Down by the river a young couple were sitting on a bench in the sun. He was white, she was oriental.

She wore quite a tight short skirt. Because of the angle of the sun, I could see the small silky white triangle of her knickers. They were chatting away and taking selfies etc., so I do not think they noticed me walking by about six or eight times. Each time I walked past I imprinted more firmly the picture of her silky little white knickers on my mind. I was getting more and more agitated. My brow was sweating, my mouth was dry, and finally my arms and legs began to tremble. Although I had not been touching myself I could feel the stickiness of precum in my underpants. At last I cracked and rapidly exited the park where behind a wall in a quiet street I masturbated with the thought of that young girl’s knickers.  It was such a calming relief when several spurts of my pent up cum hit the wall and trickled down. Equilibrium had returned.