+1. I also felt this huge gap between knowing (intellectually) what parenting is and actually experiencing it. It really changes you, to the point that now, when I talk to childless people my age, I feel like we're fundamentally differently. I think I can perceive fairly accurately whether someone my age is a parent after just a few minutes of general conversation (obviously, without having to visit adjacent topics).

I experienced this so strongly I spent some time actually writing a poem (in Spanish) about it: https://alejo.ch/39l