throwaway53086

If 1 man is non-exclusively dating 2 women, that balances out the numbers. It could also be half exclusive couples, and the other half 1:4 ratio.

Anyone with young boys and girls will notice that girls are much more likely to obey rules and instructions. A lot of doing well in school is about following rules and instructions, and it seems pretty natural that girls will do better.

Also, most teachers are women. I haven't checked, but I'd assume most school administrators are women. It seems natural that they'd construct a system that's more suited for females than males.