nature

girls want to have sex at a much younger age 

than guys know 

women know that from their own experiences 

but they keep that a secret 

in order to protect young girls 

but since some men don't know about it 

then that makes it more difficult for men to protect young girls 

and those men could make situations worse 

because of incompetence and misunderstandings 

some secrecy could protect young girls 

but too much secrecy could decrease survivability of young girls 

so spreading knowledge 

in order to increase security 

could be more efficient to protect young girls