In a college library restroom. I sucked and was sucked. Yes, it was impersonal, but 20something year old hormones need some release every now and then. I remember it being sexy and sort of daring - what if you get caught?! Mostly I remember studying the dicks that were "presented" to me through that hole in the stall wall. How different they were to mine, how they smelled, etc. I would not do that today, but back then in college it was a pleasant, exciting diversion from tedious studying in the library.