Hanky code

The hanky code is a color code for indicating sexual preferences among homosexuals, sado-masochists and others. The color of a handkerchief or bandana worn in the back trouser pocket indicates the type of sexual behavior sought, and the choice of pocket indicates whether the person seeks to be the active or passive partner in that behavior.

At this point, hanky codes are a memory, although they were once quite popular.

External links:

• http://www.sexuality.org/l/bdsm/hanky.html
• http://slippery.best.vwh.net/hankies.html