My five year old is some kind of evidence here. I let him listen to all kinds of music while showering, and he likes most the stuff from 70-80-90. Not child

My five year old is some kind of evidence here. I let him listen to all kinds of music while showering, and he likes most the stuff from 70-80-90. Not children music either. He loves hard rock or metal. He recently sang along to queen, running around on the playground singing Beelzebub has a devil put aside for him, which is a bit worrying even if he doesn't understand much English. Things like Arsenal, R.E.M. and K's Choice are also welcome. But he doesn't care at all about more modern stuff, even if there is more of it on the radio. It just bores him. We sometimes let him choose from a playlist, and he always ends up in different genres from the same periods.