Someone at CNN with way too much free time drew up an article about this a few days ago. https://www.cnn.com/2024/11/26/health/peeing-in-shower-wellness/index.html
Doctors say it is harmless and quite natural. I use the toilet myself. I don't like the yellow stain in the bottom of the shower.
If I feel a strong urge while I’m in the shower then yea I’ll empty my bladder in there. Most times I sit down and relax on the toilet to urinate. I rarely stand up anymore…
Every time, it's just so easy and relaxing, sometimes twice, once at the start of the shower and once just before I get out