Should you have to teach a man to be a gentleman?

I’m 33 and divorced. I want to be with someone that is a gentlemen’s (opens doors, walks on the street side of the sidewalk, cleans the snow off my car), things like that. If I meet someone and he doesn’t do those things do I cut It off right away or make It known that I would like those things done? I struggle because I don’t want to end It with someone early on when I haven’t voiced what I expect but I also don’t want to have to teach a man to be a man. Thanks for the input!