[JonGarfield]

The fact that someone can't perceive a difference doesn't mean it isn't there. People are not as difficult to read as you are making them out to be. And if they seem to be, then that is a problem that other people can't fix for you. It is a skill gap that an individual needs to close on their own.

I've already said why your position is unreasonable, but I'll say it one last time: These homogeneous populations with homogeneous behaviours don't exist. Even within cultures and within generations, behaviour differs according to lived experience. You will falsely rule people in as well as out if you rely on some kind of shortcut rule of thumb to indicate interest. This applies to both sexes.