ndslgm -“theres the shitas maharsha in brachos that “v’nishmartem” is only talking about ruchnius”
So what?!?
SMOKING is Ossur!
SMOKING violates the Misvat Lo Ta’aseh (prohibition) of “Ve’lo Tasim Damim Be’betecha” (“you shall not bring bloodguilt into your house”).
It doesn’t matter whether it’s s/o else or you.