Clavicle Biting
When one bites another's clavicle (collar bone) gently, causing tickling, arousal, and awkwardness. Used to turn some on, but to creep out others.
Boy 1: My girlfriend and me did clavicle biting today...it was HOT!
Boy 2: WTF man...my girlfriend did that to me too, but it freaked me out!
Boy 2: WTF man...my girlfriend did that to me too, but it freaked me out!