Swingers, who are couples that engage in consensual sex with other couples by swapping partners, are sometimes thought to use a secret code to signal their interest in "playing" with other couples. Here are some of the reported signs that swingers may use:

• Pineapples, especially upside-down pineapples, are considered to be the most common and legitimate symbol for a swinging couple. They may be displayed on doormats, clothing, art, tattoos or anywhere else.
• Pampas grass fronds have seen a resurgence in popularity as a symbol for swingers and can be displayed in the front yard, garden or on clothing.
• A black ring on the right hand is a newer code that is catching on fast with swingers. This is not a symbol that will appear on clothing, it's used only as jewelry.
• Pink flamingos are associated with swinging, especially on cruise ships, and may be found on doors or clothing.
• Garden gnomes placed in suggestive positions or hidden behind a rose bush may also be a subtle sign.

Some symbols that are often thought to be associated with swingers but are actually myths include:

• White landscaping rocks. While one gated community in Virginia is reported to use white rocks as a sign, this is not a universal symbol.
• Hot tubs. Although swingers may use hot tubs to socialize, they are not a sign of swinging.
• Anklets, wristbands, thumb rings, and toe rings. There is no evidence to support these as legitimate signs.
• Loofahs strapped to a car. This is a myth specific to Florida retirement communities, although some people may use loofahs to identify their cars.

While some swingers do use secret signs, many do not, instead meeting other couples at swinger parties, bars, or through mutual friends. Also, some "signs" are exclusive to specific swinger communities. If you want to know if someone is a swinger, you can’t rely on secret symbols and the only way to confirm is to have an honest and non-judgmental conversation.