

Thank you! 😊
I checked and I think it is only for the Netherlands (https://www.meerdangewenst.nl/category/oproepjes/oproepen-wensouders). I am not sure what country you are from, but I hope that there is something similar. I do not think that this is unique for the Netherlands probably.
He is Dutch. I think he did not fully understand the connotations that the word “daddy” has in English. If you made the same joke in Dutch it is still weird, but it feels/sounds less degrading to oneself. It would be more like saying that someone is the wisest or the adult in the situation.