Thought it was a myth, but it turns out that my GF's sister and her friends have been using jelly bracelets for just this purpose... had quite the arousing discussion last night...
http://www.sex-bracelets.com/color.shtml
The color code for sex bracelets seems to vary according to location; purple may mean anal sex in one city and holding hands in another. We've listed some of the most common meanings for sex bracelet colors, submitted from sources across the U.S. Possible alternate meanings are listed in parentheses. If you have doubts about what a color means, ask someone who's wearing sex bracelets in your local area.
The one thing that everyone seems to agree upon is that the color black = sexual intercourse
Black: sexual intercourse
Blue: blow job (alternate meaning: lap dance)
Green: cunnilingus (alternate meaning: outdoor sex, hug)
Clear: whatever you want (alternate meaning: hug)
Orange: kiss
Yellow: hug (alternate meaning: analingus)
Red: lap dance (alternate meaning: French kiss, oral sex)
Purple: anal sex (alternate meaning: holding hands, doggy style)
Silver: fisting
White: flash your tits (alternate meaning: gay kiss, French kiss)
Pink: flashing
Gold glitter: make out
Brown: toss my salad, i.e., analingus
Glow in the dark: using sex toys, e.g. vibrators, dildos, etc.
http://www.sex-bracelets.com/color.shtml
The color code for sex bracelets seems to vary according to location; purple may mean anal sex in one city and holding hands in another. We've listed some of the most common meanings for sex bracelet colors, submitted from sources across the U.S. Possible alternate meanings are listed in parentheses. If you have doubts about what a color means, ask someone who's wearing sex bracelets in your local area.
The one thing that everyone seems to agree upon is that the color black = sexual intercourse
Black: sexual intercourse
Blue: blow job (alternate meaning: lap dance)
Green: cunnilingus (alternate meaning: outdoor sex, hug)
Clear: whatever you want (alternate meaning: hug)
Orange: kiss
Yellow: hug (alternate meaning: analingus)
Red: lap dance (alternate meaning: French kiss, oral sex)
Purple: anal sex (alternate meaning: holding hands, doggy style)
Silver: fisting
White: flash your tits (alternate meaning: gay kiss, French kiss)
Pink: flashing
Gold glitter: make out
Brown: toss my salad, i.e., analingus
Glow in the dark: using sex toys, e.g. vibrators, dildos, etc.