Objectivity and subjectivity

Of course.

I know that my values are objective values. I can use that fact to judge whether the values and experiences of other people are objective or not..

By negotiation.

You can't negotiate objective values! Negotiation is the opposite of objectivity.

Perhaps I should have said that the utility of the dichotomy subjectivity/objectivity is itself subject to negotiation. The philosophical issue revolves around the concept of "consensual perceptual set". With respect to consensus, "can't debate" equates to "no need to debate".

The idea is still not clear in my head, unfortunately. Because I think that objective values doesn't exist, it depends I mean!

Yes. That is equivalent to saying that the dichotomy is useless in most cases. We are all subject to perceptual bias according to nature and nurture. In case of social disagreement, phrases arise like " you are being subjective" as though one party had privileged access to "truth", but this is bound to a particular context under negotiation.