dunno about adopting but during my stint as a kindergarten tard wrangler i was sitting next to my charge to stop them from bolting towards the door when this little girl got dropped off and started crying because it was her first day, for some reason after her dad left she ignored and walked past the caretakers, and went straight towards me and hugged me
as she was sobbing into my chest and i was hugging her back my fatherly instincts really kicked in and i had an intense urge to protect and take care of her, the feeling was really indescribable, i can't even imagine what it must feel like when you actually have a kid of your own
it also made me feel really sad because i'll probably never have kids
she also kept calling me dad for some reason while i was working there which didn't help with that feeling..