In a plastic container but there's more to it. I had a fuck buddy a few years ago who was a high end escort. She had a client who asked for shit in a container. She suspected after he came to pick it up, he was jacking off by looking at it, touching it or something fuckin weird. So he requested an order again but my fuck buddy was constipated and this client was impatient. She hits me up and says she needs a favour. I go over to her place thinking I need to give her a lift somewhere, something along those lines. She tells me the situation and what she needs. I think to myself, this woman gives great head and fulfills nearly all my desires. Do I not shit in this container and risk not getting my dick sucked anymore ? haha. I followed through. True story :P
In a boken toilet in the middle of an abandoned and ripped out old factory. I sat for a pic, pants down, and realised that I actually needed to pee. Convenient!