Before I begin let me disclose my credentials on topic at hand, since we live in a world where history (his story) is quoted along with "experts" and their numbers proving one's own be(lie)fs and other experts being dismissed in orchestrations of deliberate defamation of character. I have a few diplomas; a double degree from the world's top one percentile university, yet I value more, my amassing of knowledge over a decade on all things outside of the mainstream curriculum. Therefore I'm not an "expert", I am a student of Life and Mother Nature and will be as long as I live; my soul is an artist and to some I am a coach/mentor/advisor.
That was a long intro to a short article on our relationships with self and others. You don't need a degree in psychology nor do you need to be a parent to know certain communication skills and personality traits that are destructive to a child or a (wo)man. You've been a child and if you have an open mind, a loving heart and a connection to your soul - you will find the language of them all. My nana spoke this language. She had no children yet she was the best nana in the world and she was the best psychologist without a degree. She understood humanity at its core and this I summarize in one word: Love. She knew how to speak to and calm an angry adult just as she knew how to soothe a child in distress. There is no difference. We are all big children in distress when we act out of anger and ego. I always side on the side of a little child because children have no ego.