Reuven decides to smoke one cigarette a year. He does not plan or expect to smoke a second cigarette that year. He is full control of his faculties and not dependent on anyone else’s choices. On what grounds can you say it is assur for him to smoke his cigarette?
Smoking a Single Cigarette Rapidly Reduces Combined Concentrations of Nitrate and Nitrite and Concentrations of Antioxidants in Plasma
Masahiko Tsuchiya, MD; Akira Asada, MD; Emiko Kasahara; Eisuke F. Sato, MD; Mitsuo Shindo, MD; Masayasu Inoue, MD
Chovel B’Atzmo is Assur. Of course, there may be extenuating circumstances, but they don’t change the Halacha.