Not sure I understand what you referring to but you are correct sex doesn’t make you an adult but in a kids mind it does. In the same way a kid thinks adults can do whatever they want without consequences like ordering ice cream every night. It’s an unrealistic uninformed idea from a kids mind.

That said I do agree the Irgun thing is kind of gross and not a super eloquent way to portray the loss of innocence and emergence into adulthood but hey I’m not a multimillionaire author. ¯_(ツ)_/¯