Comparing smoking to a limp, CH”V? WTH? Are you serious? There is ZERO excuse to smoke. Ever. Not even a casual once in a while cigarette. It is chemically ADDICTIVE. That means that even if you think it’s only once in a while (which is anyways assur), it will become more than that.
Smoking is the only substance that, taken as directed, kills. On the ohter hand, Alcohol, which it is often compared to, does not kill, and in fact is supposed to be healthy in moderation. Like anything, it can be abused. But that’s different than smoking, which is addictive, *completely* unhealthy AND is also unhealthy for those around the smoker.
Also, a limp is noticeable on a first date. Smoking can be hidden until the first stress incident long after the marriage under false pretenses has occurred. And not every girl will ask, so that can’t be counted on.
Unless a reliable Rov says otherwise, do not withhold this information from a girl (or boy). It will just spread misery, CH”V, and is almost certainly violating lo saamod al dam reiacha as these poisons will be spread to the wife and babies (if the marriage makes it that long).