Morals and manners are not conflicting, but complementary, and
sometimes overlapping, parts of the ensemble of fundamental beliefs and needs that we hold simply because we are rational agents blessed with
practical reason.
As I discussed a few days ago,
sometimes you might not be a match for someone for very
practical reasons, however
sometimes, when asked a pointed question, you might give an answer, but that doesn't necessarily mean it's a deal breaking issue... For example, whilst I would prefer to not date a smoker, and when asked would answer that, if I met someone I got on with well, and they happened to smoke, it wouldn't be a complete deal breaker for me.