Hanky Code facts

While investigating facts about Hanky Code, I found out little known, but curios details like:

There's a complicated system of bandanna colors, used by the gay community, that when worn on either the right or left side signals their different sexual preferences. It's called the Hanky Code.

There's a hanky code for gay sex: Different colors and positions indicate sexual practices.

In my opinion, it is useful to put together a list of the most interesting details from trusted sources that I've come across. Here are 2 of the best facts about Hanky Code I managed to collect.