Some parts of the beach in Rostock, Germany have wardens who enforce a dress code. Those assigned in naturist areas ban people wearing clothes for obvious reasons.

The same wardens enforce etiquette on beaches designated for nudists. They ensure that no one is staring, taking photos or making unwanted comments, which are the most common complaints of nudists, said Stéphane Deschênes, president of the International Naturist Federation, CNN reports.

Moritz Naumann, head of marketing and public relations at the Rostock and Warnemünde Tourist Board, said the number of tourists going to nude beaches in Germany is decreasing. The practice, however, remains on other beaches around the world.

For nudist Americans, an alternative to beach destinations is that organized by ship charterer Bare Necessities. It partnered with Norwegian Cruise Line in organizing an 11-day nude cruise in the Caribbean starting last 3 February.

The voyage dubbed “The Big Nude Boat” was aboard the Norweigan Peal which offered the trip and accommodations for as low as $2,000, up to $33,000 for a deluxe three-bedroom villa.

There’s a different etiquette for nudists aboard the cruise ship. They need to put a towel down before sitting “in the stateroom, pool deck and buffet area” if they’re baring their bottoms, to maintain hygiene, New York Post reports.

“Fondling or inappropriate touching is prohibited, too.”

One nudist passenger of the Norwegian Peal revealed a spoiler on a nude cruise.

“Cruises seem to be for people who like to eat and lie around, so there were a lot of large people,” the 67-year-old man noted, according to NYP.

“Also, most people don’t seem to be comfortable being nude in public until later in life so the crowd was older. I’d say 20 percent attractive, 20 percent average, 60 percent unattractive,” he told NYP.