I don't know. How come some straight monogamous people get AIDS, while some gay men who have anonymous unprotected anal sex with hundreds or thousands of partners stay negative?
-1- Tobacco is by far the leading cause of lung cancer. But, as the asbestos industry knows, it isn't the only cause.
-2- Sometimes smokers -- like bathhouse goers -- just get lucky. The odds, however, are pretty slim.
Great to see life saving candid truth on such threads.