Solvent abuse
Solvent abuse is one of the Western world's oldest pasttimes. Solvents such as superglue and aerosol propellant are usually inhaled by using either a bag or through a towel.
(Mother walks into bedroom; son is sat over a bag full of whiteout with three cans of air-freshener on bed.)
Mom: What the fuck are you doing?!
(pause)
Son: I'm practicing ballet! What the fuck do you think I'm doing, bitch?"
Mom: What the fuck are you doing?!
(pause)
Son: I'm practicing ballet! What the fuck do you think I'm doing, bitch?"