when to hug

In Australia it can be like this:

It can be bad to touch someone (in a hug) if it is like this:

I do not know this person well. This person does not know me well. I am not with this person at many times. This person does not feel something good towards me.

It can be good to touch someone (in a hug) if it is like this:

I know this person well. This person knows me well. For some time before now, we were in the same place.

If I want to touch someone (in a hug) it can be good if I say something like this “I want to hug you. I want to know if you can feel something good because of this.” I can say this not with words.

If this person says something like “I feel something bad” it is very bad if I touch them (in a hug).