Relieving oneself out-of-doors should be the easy part if you aren't too modest. As a motorcyclist I know only too well the unexpected necessity of this.
The more challenging aspect of the natural process for humans is the desire, both aesthetically and for health reasons, to cleanse one's fertilizer processor after production.
Our U.S. pioneers on their long trek westward, faced with this very dilemma, learned by trial and error natural solutions to their problem. And woe be to he who chose the wrong plant for his experiment.
https://urbansurvivalsite.com/ways-t...paper-is-gone/
A small gaggle of geese invaded my swimming hole recently and I learned something new. They have little concern for the cleansing aspects of defecation. Should a dangler cause distress a simple flick of the large webbed foot rearward solves the problem.
After a noisome week of watching them enjoying my private beach I thought I knew why Rabelais once suggested using their downy feathered necks as a substitute for toilet paper.
https://knowledgenuts.com/why-you-sh...a-gooses-neck/