does chewing tobacco cause clogged arteries Smoking and smokeless tobacco slowly destroy the mouth teeth and Benefits of quitting tobacco: MedlinePlus
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Apply an ice pack to the cheek (20 minutes on, 20 minutes off) throughout day 1 to reduce swelling

For one thing, they happen to be legal for a minor to buy, which smokeless tobacco is not

Furthermore, distal peer influence is not accounted for in the SIENA models

And just in case you didn't realize when this movie was made, there's the infamous disco prom scene