I mean, yeah, sometimes there’s a Canon Event, but I think for most ppl it’s just the onset of puberty, which sometimes precedes or coincides w/the onset of things like hereditary depression or schizophrenia but for everyone leads to a fundamental alienation from whatever
Boys seem to nearly universally - usually in their early teenage years - experience something that breaks their hearts in such a specific way as to emotionally cauterize them.
So many of them go from being sweet little guys to internally numbed, externally nonchalant performers.