Nothing like a bidet to bring out toilet humour.
Having travelled in China
I find that many better hotels have various toilet seat bidet adaptions which are very simple, compact and economical to use. Several women of my acquaintance consider them reasonably civilized. I intend to include these on own boat - not mandatory to use, not expensive or very energy consuming and probably just a small thing to entice the partner on board for longer trips. If you have not tried it then it probably seems over the top. I don't think them an unreasonable extra when the marine environment
is challenging for damp nether regions. They would have installed easily in all the boats I have had from 26' to 41' without compromising space.