I used to drive a food concession
I used to drive a food concession truck. A lot of people don't know about them, but they're the kind that go to construction sites and industrial areas to sell coffee, sandwiches, and all kinds of stuff, and then move on to the next stop.
One time, I really had to take a dump during my break, but I didn't think I could make it to a washroom and still get to my next stop. So since I was parked in this undeveloped industrial area, and I had lots of weeds for coverage, I just squatted and did my business on this one undeveloped commerical property. I wiped myself with paper napkins.
I felt dirty for whatever you call that. Littering? Obscene bowel movement? But I rationalized that it was all biodegradable and it was an undeveloped commerical area.