I think that as adults we do teach people how to treat us by what are/are not willing to put up with.

Example,if someone treats me like **** and I don't stand up to them and overlook it then it's most likely going to continue.But if there were boundaries and consequences whenever the boundaries are crossed then they would learn quickly treating me that way is not ok and will not fly with me.

I never learned this early enough and it's exactly why so many people treat me like ****.I wish I had always stood up for myself,set boundaries and taught people how to treat me because it's very hard to try to change relationships and set boundaries with ppl that have a habit/pattern of being awful towards me.