The concept of "urine therapy" has been around for many hundreds of years. Though this isn't what this post is about, UT sheds a little light on *why* some people take a urine enema.
From a medical perspective, as many said before, urine is sterile in a healthy person; it should contain no traces of bacteria or any living organism(if it did, you'd be having one bad bladder infection). It's mostly water, salt, and waste products... we all know this.
The way urine enemas apply to UT is that although urine contains "waste products", they are waste products that can still be reused by the body. Color of urine is often dictated by how much minerals and vitamins your body is expelling because you didn't need them. Oftentimes, a urine enema allows the "waste" minerals and vitamins to be recycled into your body for an actual *positive* effect. This is one of the more often-cited positive benefits to a urine enema.
The downside is, of course, risk of infection or an undesired side effect. Urine, if left exposed to open air or even sealed air in a container, will turn into ammonia, which is a toxin. Therefore, urine left in, say, room temperature in a plastic container for three days probably isn't the best idea.
Although I won't disclose my preference regarding urine, these are just one positive and one negative aspects to using urine as an enema recipe. Hope it helps! 😉