Can you ever tell adults whose taste in music is different to grow up?

Generally, handing them a copy of "The Secret Power of Music" helps.

Chronologically speaking,  that doesn't make any sense.   Not only are they older, but new music is not mature. 

Basically,  if you think that anything out there is better than Tool, shoot me their names.  I doubt seriously that you will;)

I have no idea what your on.

Admit it, we have the best music your music sucks

I wouldn't necessarily tell them to grow up but to accept that not everybody has the same tastes in music.