In the parking lot of the Hoboken, NJ police department, although technically, I wasn't jerking off, as someone else was jerking me there.
He had been cruising me on the PATH train from New York City. When we got to Hoboken, he was following me and glancing at me, but on the other side of the street, as I walked. Finally, I went over to his side, and we slipped into a dark alley, where he wanted to blow me. Bue every time he dropped to his knees, a car would start to come down the alley. We sought out a dark parking lot instead. While he was jerking me, I noticed that there seemed to be a number of police cars in the lot, and then realized we were in back of the police station.