Do knee trembler still happen. I remember a few in Belfast back in the day, in round St Anne's Cathederal area after the Kremlin closed at nights. Body Park before they cut the hedges down.
Knee trembler is slang for an outside sexual encounter, up an alleyway or in bushes etc. There used to be an area of Belfast near The Kremlin bar that was very busy both guys when the bar closed. It was a cruising area back in the day.
