I read mysteries. Right now I'm in the middle of a Lord Peter Wimsey mystery where PW grabs a friends pipe and puts a pipe cleaner down it so that he can dirty Bunter's hands (ugh).
After doing so, PW states that his friend needs to clean his pipe or he'll die of nicotine poisoning.
I know that ingested nicotine will kill a person, but just how filthy does a pipe have to be before it's lethal,
or, is it even possible?