Did a urine enema a few years back. Drunk and wanted to know what it would feel like. Nothing special really. The excitement of an enema to me, and seems a lot of others, is the preparation, execution, liquid, retention and expulsion. So urine was just a different liquid to try. There are others that I found more exciting or taboo as it were. Some alcohol, beer and champagne and sodas for the fizz, various fruit juices, milk and molasses, heavy cream and eggs, olive oil, and numerous other liquids that all just seemed nasty to me. So urine was no big deal and I really don't remember it was anything special other than having a slight slippery like light oil feel to it.