I'm not exactly sure what kind of "signals" you are referring to, perhaps I haven't had enough coffee ha ha ha.

That being said though, I can relate to people just randomly telling you things like this:

I am told things like this frequently. I am not married, but I am often told that I am intimidating, frightening, domineering, and the like. It can leave me asking WTF too! These things aren't intentional on my part so yeah I don't get it when people either say these things to me directly or imply it.

I think that for me, since things like being "intimidating" just seems to be a trait I have regardless of what I do, that it is indeed just in my nature. It's just how I am.