Sign sparks theory swingers on Ultimate World Cruise are hoping for a pleasure playground

They’ve sailed into the New Year — but are they swinging into it, too?

Social media users are speculating that sexed-up swingers are among those on board Royal Caribbean’s Ultimate World Cruise after one elderly passenger shared footage of a suspicious sleazy sign meant to be a secret code tacked to her door.

The intrepid traveler, known only as Alda, recently started a TikTok account to document the epic cruise, which departed Miami on Dec. 10 and is set to sail the world for the next nine months.

In one clip, uploaded on Dec. 24., Alda showed off the inside of her cabin, but eagle-eyed TikTokkers were distracted by a pineapple placed on her door.

Pineapples — particularly those that are flipped upside down — have long been used as a discreet symbol to signify a person’s interest and availability for swinging.

“This is my cabin,” Alda excitedly declared as she filmed the front door of her cabin, which featured the image of the frisky fruit. “It’s an ultra spacious family room.”

She subsequently showed TikTok viewers the inside of her boudoir, scanning to the bed she shares on the ship with her husband, Lee.

Alda showed off the inside of her cabin, but eagle-eyed TikTokkers were distracted by a pineapple placed on her door. TikTok / @aditaml2759
“This is my cabin,” Alda excitedly declared as she filmed the front door of her cabin, which featured the image of the frisky fruit. TikTok / @aditaml2759

“We have huge big window right above the bed,” she enthused. “We are right at the front of the ship.”

The video quickly clocked up more than 3.8 million views, and while some were wowed by Alda’s digs, many more were intrigued by the pineapple placed on the door.

“9 months of swinging, I’m glad that room is so spacious!” one quipped.

“The pineapple??? Oh, you’ll be having lots of fun,” a second remarked.

However, one wondered whether Alda had innocently decorated her door with an image of the fruit as she was unaware of his saucy second meaning.

“Correct me if I’m wrong! Aren’t pineapples signs of hospitality but the ones turned upside down are what we’re all thinking about?!” they asked.

Alda subsequently uploaded another video to her TikTok account insisting she and her hubby weren’t swingers.

However, the cheeky passenger played up the rumors by donning a bright yellow shirt featuring a photograph of the fruit.

Alda subsequently showed TikTok viewers the inside of her boudoir, scanning to the bed she shares on the ship with her husband, Lee. TikTok / @aditaml2759
Some were stunned by the amount of pineapple paraphernalia the passenger had at her disposal, saying the clip left them more convinced than ever that she and Lee would be having a wild time on the high seas. TikTok / @aditaml2759

“Sorry to disappoint you, but we are not swingers,” she stated with a mischievous grin. “But we do like pineapples! Here’s my pineapple ring, my pineapple necklace, my pineapple earrings … and here’s that infamous sign from my door.”

Some were stunned by the amount of pineapple paraphernalia the passenger had at her disposal, saying the clip left them more convinced than ever that she and Lee would be having a wild time on the high seas.

The cheeky traveler later added footage from a New Year’s Eve party on board the vessel with the cheeky caption: “Swinging into 2024!”

In another TikTok clip, Alda announced that she had discovered an upside down pineapple tacked to another cabin door. TikTok / @aditaml2759
The vessel, aptly named Serenade of the Seas, is currently sailing to 60 different countries over the next 240+ days

But while Alda’s swinger status remains shrouded in mystery, there does appear to be some definite swingers on board.

In another TikTok clip, Alda announced that she had discovered an upside-down pineapple tacked to another cabin door.

“Well look what I found on my walk down the halls this morning!” she captioned. “They are here after all!”

Those who are looking for some horny high-seas fun will have plenty of time and space to do so on the Ultimate World Cruise.

The vessel, aptly named Serenade of the Seas, is currently sailing to 60 different countries over the next 240+ days. According to the New York Times, fares for the trip start at $53,999 per person.

The ship has a capacity for 2,476 guests, meaning there will be plenty of fresh faces for frisky sailors to see.

The Post has reached out to Royal Caribbean for comment.