Pipe Smoking and Doc Martin

My wife is watching an old episode of Doc Martin.

I overheard this conversation:

Old lady: Is it bad?

Doc Martin: It could be lung cancer. Why do smokers always think that they will be one of the lucky ones, who can smoke and still live to be 70?

Old Lady: I’m 75.

Doc Martin: Well, eighty then.

Old Lady: My mother smoked a pipe till she was ninety three.

Doc Martin: And then she died.

Old Lady: No. She lost her pipe.