I learned something both amusing and disturbing from my husband after a visit to my parents home when I was in my twenties.
He asked me if I were aware that I "revert to about fifteen years old" when we visited them. After that I started to pay attention and noticed that he was right. That was the start of learning how to have an adult relationship with my parents. And, somewhat unfortunately, having to teach them the same in reciprocation.
It was a good thing to learn. Now I am having to learn how to be a good "parent" to my mother.
That's interesting, were they controlling parents?