You can cheat by holding shift and pressing ~ on your keyboard, which adds a “cheat stats” button to your bottom menu bar.
Here’s the fastest way to get all the passengers nude:
- press the “cheat stats” button until your stats are at around 31. This is enough that passengers should always accept your request to have sex with them.
- Request sex with several different passengers, I think 2 should be enough but 3-4 is safer.
- Go to your room and sleep until the last day of the cruise, then press the wait button repeatedly until the cruise ends.
- After the cruise, you’ll earn a VIP point. Spend it on the the option “Feedback: passengers dress too conservatively.”
- Start a new cruise, go to step 2.
Passenger nudity becomes allowed after giving feedback 3 times. It becomes mandatory after 5 times.