The digestive system works on the whole body and since after a meal it is very active, the nicotine from the cigarette binds with the oxygen in the blood
We also see Williams speak honestly about his struggles with alcoholism, as well as guilt about sex (a possible allusion to his constant womanizing)
Increased tolerance, withdrawal symptoms upon cessation, a fixation on obtaining and using the drug, forsaking key responsibilities, alterations in sleep patterns, mood instability, secretive behavior, and engaging in dangerous activities are indicative of this addiction
Significant emphasis must be placed on the cleansing of the skin and hair
These masks primarily target solid particles and may offer limited protection against airborne hazards of a gaseous nature