Hey, English is not my native language and "getting off the rails" here was meant, that you are leading yourself astray and falling off the cliff. I mean you are losing track of this debate that smoke is causing a cancer.

But to be fair, I can't see sense of following other logic of yours, because I recently lost a relative to a cancer and there was absolutelly nothing to blame for, except that she got into toxic environment, which killed her.

Also, if we come to that - did you know, that in UK there were cases, that spouse was poisoned by chemicals, that causes cancer - are you aware that there are thousands of medical drugs, that has side effect that might cause cancer? How are you going to explain those with your logic? So, apparently person is developing a disease, and in process of treating that disease, person develops a cancer... good luck in explaining that with behavioral impact, like you are trying to do on fixating on HPV, which is only one of thousands viruses that can potentially damage cells and eventually damage cell programming and cause a cancer.