Thanks for the ask. Honestly I think you’ll be surprised once you get comfortable with that how receptive men will be, assuming you are talking to mature men. Guys either fall into two camps: D/s is a weirdo fetish things or they think it’s hot. Few people are indifferent to it.
You should be able to spot if they are in the weirdo fetish camp with a few prodding questions or innuendos. I know a few times at work I’ve drank a bit too much and hinted I’m a Dom by saying “Goddamn I need to yank some fuckin’ hair right now” or something dumb like that when I was drinking. The girl I was talking to heard it loud and clear. I didn’t want to be with her but had I and had she wanted to, I would have known and she would have know what kind of sex was to be had.
Now as for the D/s dynamic in a relationship; that is more intimate conversation and should only be had with people who understand and know you well to begin with.