Purple: kiss their own sex
Red: lap dance
Green: oral sex on a girl
Clear: whatever the snapper wants
Blue: oral sex on a guy
Black: all the way
Glittery Yellow: hug and kiss
Glittery Pink: also flash
Glittery Purple: French kiss
Glittery Blue: anal sex
Glittery Green: 69
Glittery Clear: touch any part they want (just touch!)
Just because someone is wearing these doesn't mean that they are sexually active or "playing by the rules". They can be used as a fashion statement or as a... you know...
Snapper Guy: Hey, you know what that means! (hip thrust)
Girl: Sigh, uh, I don't play by the rules.
Guy: Sure you don't.
Girl: Fine. Come over to my place tomorrow at 10.
Clear: wild card
Blue: Blow job
I don't know the rest. Why bother?