does harrison ford smoke cigarettes making a phone call in 1980 I'm not buying Harrison Ford

John has smoked for 10 years + 16 years = 26 years

Not all smoke is the same when youre trying to paint over smoke-stained walls

Very low nicotine sensation

26 The association between increased levels of NNK uptake and higher risk for lung cancer is completely plausible based on the powerful genotoxic carcinogenicity of NNK for the lung that has been observed in studies with mice, rats, hamsters, and ferrets treated with NNK, including some studies which used very low doses

References: Centers for Disease Control and Prevention (CDC): Smoking and Tobacco Use: Data and Statistics

However, when taken sublingually, the effects are generally faster due to direct absorption into the bloodstream