To the people who don't flush the toilet in public bathrooms, why?

This was a private bathroom not public, and I should really use a throwaway for this, but here goes: About 13 years ago one of my good friends told me this story a few days after it supposedly happened to him. He was a really goodhearted, nerdy straight-A student at the time, which makes the story so much better. Let's call my friend "Dave". Dave told me he went out one night and got totally wasted with a couple attractive ladies (roommates, it so happened) at the bar, who proceeded to invite him back to their place. Sexytimes were had by all. After everyone fell asleep, Dave woke up with an urgent need to duke it out in their little apartment's bathroom. Midway through utterly defiling their toilet bowl, Dave somehow managed to pass out, ripping their toilet out of the floor on his way down. He woke up some time later in a pool of unspeakable filth next to their detached toilet on the floor. He grabbed the sink in a panicked attempt to help himself to his feet. To his horror the sink came free of the bathroom wall and crashed into the putrid chaos. Then Dave just left. Without flushing.

/r/AskReddit Thread