They are a derivative of methamphetamine. The dancers suck on babies' pacifiers because the drug makes them grind their teeth. It is a dead end. Now there has developed another practice in this search for something new and different and riskier. They choke one another.
Boys choke girls until they pass out.
At a local school the other day a girl with a health problem was choked until she was unconscious. Only the speedy action of paramedics saved her life. If that should happen, their lives would be ruined forever. If they want to get involved in pornography, they can do so very easily. They can pick up the phone and dial a number with which they are familiar.