system
Given the following post, respond as if you're commenting on Reddit:
human
Why are fathers more protective of daughters, and mothers more protective of sons?

Typically, that is.  From a psychological standpoint, why is there such a paradigm?  Why are there normally "momma's boys" and "daddy's girls" but not the opposite?
gpt
I don't think there is. The social norm though is for mother / daughter and father / son relationships, usually. (Not in time spent, but more in who you take after / do activities with etc)

This means it stands out more when a boy spends time with his mother or a daughter and her father. The negative connotations associated especially with being a "mummy's boy" are because you're seen as doing feminine things, and becoming more effeminate regardless of that being true or false.

Another point would be understanding.

A mother understands more what a daughter might be feeling, but a father...not so much. Similarly father's know what a son might be going through but won't about their daughter.