What is and isn't considered harassment is highly culutural.
As long as men and women within one culture largely agree where the line is- fine.
But in surveys, men seemed to be a small bit more casual about thing- meaning, in a few cases, even within a culture, men and women do disagree on whether something is harassment or not.
And then the offended party may try to change public opinion - but stating how relative this all is is tactically unwise. It is more successful to state things as absolute and unambiguous, even if they aren't.
That said, whether one has committed harassment can be easily found out by asking public opinion. - and so far, men AND women largely agree that, say, the weinstein case is not debateable. Or the Kevin spacey case.
Or Roy moore.
Bur the line IS fuzzy, and probably flirting will vanish and the whole mating ceremony will be relegated to tinder, as a bureaucratic solution.
we can't find a common standard. - because almost by definition, someone will always be upset. Old mutually understood standards were based on tradition, and we're not renegotiating them, or slowly moving them, but looking for absolutes...
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I can read facial expressions. I did the test.