There is a fascinating Tshuvah in the Tshuvos V’Hanhagos (R’ Shternbuch) where he says that women smoking is an Issur of Begged Ish. I was curious why or how this could be so, so I did research. It was illegal for women to smoke in public in South Africa until the 1990s (maybe 1980s). So he never saw a woman smoking. Hence, he considered it Begged Ish.
To answer the OP, I reject his assumption that it’s acceptable for guys to smoke.