As a parent, I would actually challenge that somewhat. My boundaries with my kids (and students - I'm a teacher) are flexible, allowing for exceptions, situations out of the usual routine, individuality. They are always fair and keep the needs of my kids and the family as a whole in mind (or classroom or school), but my kids know that sometimes boundaries have to be adjusted. Life is simply not consistently consistent. Being able to understand and adjust flexibly to life's inconsistencies has helped my kids learn to go with the flow somewhat, not overly stressing when things don't go as they always do.

I guess I learned that from my parents (and from teaching which requires a HIGH tolerance and need for flexibility), so it was just something I naturally have done with my own kids. In my therapy, boundaries really have been a non-issue, but I think it is because I am pretty good at reading other people's needs and boundaries and realizing change and individualization is inevitable. So long as it is fair and reasonable, I have no problem with adjustments in boundaries.