color code handkerchief code http://id.loc.gov/authorities/subjects/sh00003702 https://en.wikipedia.org/wiki/Handkerchief_code https://homosaurus.org/terms/handkerchiefCodes https://www.wikidata.org/wiki/Q1575643 A color-coded system, employed usually among the gay male casual-sex seekers or BDSM practitioners in the United States, Canada, Australia and Europe, to indicate preferred sexual fetishes, what kind of sex they are seeking, and whether they are a top/dominant or bottom/submissive. Note that, since the 1970s, many groups of LGBTQIA+ persons (not just gay men) have started using similar codes in certain spaces. bandana code flagging handkerchief codes hanky code handkerchief code http://id.loc.gov/authorities/subjects/sh00003702 https://en.wikipedia.org/wiki/Handkerchief_code https://homosaurus.org/terms/handkerchiefCodes https://www.wikidata.org/wiki/Q1575643 A color-coded system, employed usually among the gay male casual-sex seekers or BDSM practitioners in the United States, Canada, Australia and Europe, to indicate preferred sexual fetishes, what kind of sex they are seeking, and whether they are a top/dominant or bottom/submissive. Note that, since the 1970s, many groups of LGBTQIA+ persons (not just gay men) have started using similar codes in certain spaces. bandana code flagging handkerchief codes hanky code Dr. Harmony's Glossary of Kinky Terms LGBTQ America Today: An Encyclopedia