They wall themselves off in their relationships as a way of protecting their emotional selves, and, as a consequence, will, in all likelihood find it difficult to form lasting close interpersonal bonds with others in adulthood as they are still trying to individuate from their parents.
The exception in this is of relationships predicated on the same rigid rule based structure as their family of origin where nothing came into the family or out from it, but in this case the bond is likely to be enmeshment.
Consider the role of the father or mother who screams at his/her children or becomes physically, verbally or emotionally abusive with them as a self-centred way of dealing with his/her own stored up anger/grief from their own traumatic childhood.
When two people come together, each with a clear definition of her or his own individuality, the potential for intimacy and commitment can be astounding.What the children are likely to learn in this situation is that boundaries don't matter, that indeed they, as individual human beings, don't matter except where they are useful for the emotional needs of others.As they grow up in their families of origin, they lack the support they need from parents or caregivers to form a healthy sense of their own identities. In fact, they may learn that to get their needs met they must get their way with others.When we lack a sense of our own identity and the boundaries of the self that protect and define us as individuals, we tend to draw our identities, our sense of self worth from our partner or significant other as we did in the earliest stage of our biological growth in our family of origin, drawing our sense of worth from their perceptions of us.The structure of the relationship in this case is not that of equals in a partnership but that of parent and child.We are, all of us unique, and boundaries allow us to rejoice in our own uniqueness.