Non smoking dating sites
Probably for the same reason there are far fewer marriages in which a smoking wife is married to a non-smoking husband (only 6.5%) than there are marriages in which a smoking husband is married to a non-smoking wife (11%).
I’m afraid I don’t really have any evidence that smokers are less likely to marry.
The data certainly makes it look that way (for example only 17% of married women smoke compared to 22% of never married women) but that evidence doesn’t control for the fact that never married men and women are also more likely to have less education (and that less educated people are more likely to be single).
There is research (cited as a working paper below and whose data I have used here) that shows men who smoke tend to be married to less educated wives than men who do not smoke, which isn’t that surprising given that smoking women are in relatively short supply and less educated women smoke more than do educated women. “Separating Fact From Fiction: An Examination of Deceptive Self-Presentation in Online Dating Profiles” Perspectives Social Psychology Bulletin 34.
My son told me yesterday that he doesn’t think he will be dating this year since he refuses to date any girl who smokes. I wonder if the group of girls that I see collected outside of his school in the morning having one more smoke before the school day begins realize that because of their habit they are missing out on a real catch. And since here in Paris (where I live at the moment) smoking is so prevalent, these girls may never need to worry that they are limiting their prospects on the dating market just because they started smoking when they were twelve.