Well yes but eeew …
You can use PH neutral soap. Showering with water only is not a good idea. Using high quality soap and shampoo is! (High quality shampoo won’t foam when hair is dirty, pH neutral soap won’t burn in pee hole)
Edit regarding topic: I tried the “only” water method because I found soap and shampoo to be too aggressive. The smell isn’t the issue if you wash daily and change clothes daily (everything reeks in the evening) but the effort and the oilfactory social paranoia isn’t worth it. => See solution above.
Ideally you got a hair dresser who knows his trade. Ask them what they suggest when you get your next hair cut. They gladly sell you some. It’s expensive (like 30-50€ a bottle) but you use only small amounts and it lasts for approx 2-3 months.
For me it stopped hair loss, itchy scalp and scales. It was a nightmare. Now, normal fat free hair. Wash every 2-3 days.
Ph-neutral soap can be bought in pharmacies or some supermarkets as “intimate areas soap for women”. But it definetly works on male body parts too =)