Last annual training (for the US Army reserves), I was on a training driving mission. The dust was thick and we had to leave the windows down so we could shoot our weapons. It was a long dirty day, the dust covered me thickly from head to toe. I was literally daydreaming about the shower I was going to take, the mud flowing off me. It was going to be orgasmic (without touching anything).
So we get back to the Cob and are welcomed back by a soldier who was there to check us in and update us on what was going on. I was starting to head back to check-in with my Chaplin (I am a Chaplains Assistant, so more is expected of me in language and attitude), and someone said to the Staff Sargent "oh, you can't go take a shower, someone took a dump in there and now it needs to be sanitized". Without thinking, a pure reaction to what I heard, I yelled at the top of my lungs "WHAT, WHO THE F*** IN THEIR RIGHT MINDS TAKE A S*** IN THE SHOWER!?!!" I then immediately claimed down and apologized. Every one was staring at me with disbelief shock that I said the F-word, up to this point no one had ever heard me raise my voice let alone swear. Of coarse, everyone in my battalion had heard this story by the time I walked the 10 min. to the command tent (I mean this literally, I really do not know how the story got there before me) and everyone had a good laugh at it.
The only reason I did not get in trouble was because everyone was thinking what the same thing (really who poops in the shower), and it was so unusual for me to swear.
I rarely swear, perhaps once every 2 or 3 months.