We can all joke about it but remember when you were in your late teens and early twenties and you saw someone in his 30's 40's what did you think in general.
I would never want to be back in those years and be as innocent as i was we always think we know everything as we grow older but everytime we look back at our life how many time do we think hey how stupid was I to think that and I'm sure that in 20 years I will think that of today, life experience can only come with years can't escape that some grow faster but in general innocence comes with youth.
I would love the youth of my body but would never go back to the youth of my mind.