Some things can sound childish without being from a child part. So I can stomp my feet and say I don't want to get out of bed. It sounds like a surly teen but it's no unmet teen need. Is it possible it could be adult you feeling something or saying something that can be heard as childish without it being an unmet need from childhood? Sometimes it may be easier to say that thaan confront that we are the ones saying or feeling childish things because we feel that way now and not because it's some old hurt or past grievance.

Sometimes we all want to pout and stomp and that's an ok part of our adult selves.