Having taught ABE (Adult Basic Education) in a prison, I can vouch that the origin of "sagging", as advertisement of availability, is true. Many young "thugs" came in sagging. Then a convict would grab that butt. Next thing you know, they were keeping their pants up and belts tight. 


I had a couple of classmates who loved to sniff that stuff when it first came out. I very much doubt it gave them a high but it made them happy. Remember how long that stuff used to take to dry when it was first available? And how the ink used to bleed though? Several of my teachers in the early 80s wouldn't let us use "that white stuff", insisting we continue to cross out our mistakes instead.
