this is actually false, its perfectly possible to understand SPOILERS PLEASE DO NOT READ IF YOU HAVE NOT WATCHED NEON GENESIS EVANGELION IN ITS ENTIRETY --- instrumentality = humanity becoming a hive mind after there bodies disintegrate in to LCL, the last 2 episodes of the tv show, give us instrumentality from shinji's mental perspective with zero context for what instrumentality is or how it came about, ends with him making up a happy ending for himself instead of accepting the reality of the situation, the end of evangelion (1997) movie gives us context showing 3rd impact taking place in the real world bringing about instrumentality, then shows shinji's mind further down the road rejecting instrumentality allowing for himself and anyone else to come back to physical life should they wish to. thats it.
Summed it up pretty nicely. Sure it's not the easiest thing to get right off the bat, but after you think about it it's not that hard to get, still amazing though.
But think about what kind of era it is compared to our world. Its not too weird considering they fight with swords and gundos and cars only work through magic. Older people got with younger girls than that in the middle ages.
Not to mention one of Chaikas was actually a femme fatale. Unless these aphrodisiacs turned everyone into pedophiles, I guess Chaika's old enough for sexual intercourse by setting standards.
If she's old enough to pee she's old enough for me. In all honesty though this whole 18+ (16+ depending on where you live) thing is fairly recent. People ****** young girls all the time, not that it wasn't wrong, but it wasn't a big deal back then.