An upside-down pineapple is a symbol that is used by swingers, people who engage in consensual non-monogamy, to identify each other in public. It is a discreet way for swingers to signal to others that they are open to swinging without having to explicitly say so.
The upside-down pineapple symbol is thought to have originated in the early 1970s, when swingers began using it as a way to identify each other at swinger parties and clubs. Over time, the symbol became more widely used, and it can now be seen in a variety of settings, including on cruise ships, at resorts, and even in everyday life.
Why a pineapple?
There are a few theories about why pineapples were chosen as the symbol for swinging. One theory is that pineapples are associated with hospitality and welcome, which is something that swingers want to convey to others. Another theory is that the pineapple’s bumpy texture is similar to the sensation of sexual arousal.
How is the upside-down pineapple symbol used?
Swingers use the upside-down pineapple symbol in a variety of ways. Some people wear upside-down pineapple jewelry or clothing. Others place upside-down pineapples in their homes or on their cars. And still others use the upside-down pineapple symbol online, in dating profiles and social media posts.
On cruise ships, the upside-down pineapple symbol is often used by swingers to identify each other and to signal that they are open to swinging. Swingers may place an upside-down pineapple on their cabin door or on their beach towel. They may also wear upside-down pineapple clothing or jewelry.

What does it mean if you see an upside-down pineapple?
If you see an upside-down pineapple, it means that the person who is displaying it is open to swinging. It is important to note that not everyone who displays an upside-down pineapple is a swinger. Some people simply like the pineapple symbol or they may not be aware of its meaning in the swinging community.
If you are interested in swinging, and you see someone displaying an upside-down pineapple, you can discreetly approach them and ask if they are interested in talking about swinging. If they are not interested, they will respectfully decline.
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Is it okay to display an upside-down pineapple if you are not a swinger?
It is generally considered to be okay to display an upside-down pineapple even if you are not a swinger. However, it is important to be aware of the potential meaning of the symbol, especially if you are displaying it in a public setting. If you are not sure whether or not it is appropriate to display an upside-down pineapple, it is always best to err on the side of caution and avoid doing so.

The upside-down pineapple and the LBGTQ+ community
The upside-down pineapple symbol has also been adopted by some members of the LGBTQ+ community. For some LGBTQ+ people, the upside-down pineapple symbol is a way to signal that they are open to new experiences and that they are not afraid to be themselves.
Conclusion
The upside-down pineapple symbol is a complex and multifaceted symbol. It can be used to represent swinging, hospitality, and even LGBTQ+ pride. If you see an upside-down pineapple, it is important to be respectful of the potential meaning of the symbol and to avoid making assumptions about the person who is displaying it.