When are we mature enough to die...?

At every point in our lives, we do things that in later times of our lives we end up disaprooving of an refering to as stupid and immature. It is apparently because a more mature version of us is the one sitting in judgment at this point in time, thus the dis-reputing of the earlier decisions we made in life. Maturity kills us thought-slowly squeezes the fun out of life leaving us simply an  old burnt out boring people( some wise guy some where must have said that)... however, when are we mature enough to die, and should we thus so choose simply because as we grow, we shall dis-approve...? i choose to forever be stupid; and besides, in the words of Mark Twain, we shall regret more the things we did not do twenty years from now than those we did.
                     I choose to be young