I was going to mention that nicotine itself doesn't cause cancer. It's purportedly the pyrolytic products of combustion of the various components in tobacco (nitrosamines) that does that. How that works is another more-involved matter, but in analogy it's like saying the caffeine in Coca-Cola (and not the sugar) is making you overweight.I imagine everyone just has the same access to the quick an dirty search on the topic. My suggestion would be to not focus on "Pipe smoking" or "cigarettes" but instead Nicotine's impact on PSA levels.
For example, there are 46,675 studies in the National Library of Medicine that mention "Prostate Specific Antigen", and exactly FOUR that mention "Prostate Specific Antigen" AND "nicotine," and those four studies deal with prevalence of testing in people who vape and other unrelated things.




