No, there is: if the victim told you it’s harassment, you immediately stop. You jail those who don’t stop after being asked to stop.

Legally speaking you don’t need to define the ways in which the law allows you to unconditionally communicate (verbally, physcally or non-verbally) with me. If I told you to stay back - then you should stay back and I don’t owe you an apology.

You’re trying to reduce everything to relativism. I think the real world is quite a bit more black and white in such cases. And we have jury for the cases that are gray areas.