If you haven't heard of Rule 34 by now, then you're using the wrong news aggregation service. Never fear, for I am here to reveal the glory of the aforementioned rule, and that self same rule's NSFW proof of concept... To say nothing of the glory holing of Rule Social B 99.1. If you can't risk clicking on that link, that's okay, here's a totally office-safe demonstration: a flickr group for public transit butt sex. Well sort of, if by "butt" you mean "bus," and by "sex" you mean "recovery vehicle." I feel like the guy on the other side of the goatse.cx lens; "when I took the photo I had no idea there was an audience for it..."