Once you get into a heart of a teen, you remain there for the rest of his life. Many bands well past their peak have a revival of private bookings now, as people who were teens back then become rich people who can book a band for a party.
Interestingly, when I was in school, we were taught that "he" could be used both for male or for gender-neutral usages.
The shift to treating he/him/his as exclusively male seems to be a fairly recent phenomenon (last few decades) as American social progressives sought to change language to be explicitly-inclusive instead of implicitly-inclusive and to avoid confusion due to the context-dependent dual meaning of such words.
1970s - "he" means everyone
1990s - "he/she" means everyone
2020s - "they" means everyone
this is also occurring in a tonne of european languages: german, french, spanish, italian, etc. it's progressives and people who care for others, not just americans.
as is well studies, we know very concretely how language and word usage influences thought (because it is thought, expressed)
