I've made a post about this before, but I still haven't found it. It was a single comic page if I remember correctly, with it being a woman on a subway feeling slightly flustered when she feels a man's boner behind her. It zooms out showing that the man is getting fucked behind her. The exact details to help describe it is the man is in a full suit with only his pants pulled down slightly from behind, while the guy fucking him is faceless wearing a white t shirt and a hat. The train car is also crowded as well, and is in black and white. Any help finding the full image would be great, since I saw it on godtubergowasu's page years ago(they post very borderline NSFW memes and YouTube thumbnails, so the original video with it as the thumbnail is long gone)