Boys will be boys

I booked a ticket for "Chronicle", then told my friend that it was mostly because of its tagline in the poster : "Boys will be boys"

It kinda struck me the same way those "Young and Dangerous" series, HK triad movies or the Japanese's "20th century boys" did.

My friend told me : "Yeah, (boys) can't never turn to be men".

And I really want to ask her this : "You want them to become what made them happy, or you want them to become what made you happy ? Given that you know, whatever they do would eventually just to make you happy ?"