Did you know that one minute after midnight on your 18th birthday you can - without asking Mum or Dad - get married, sign a lease, raise a mortgage, buy consumer goods on H.P.? All because a number of middle-aged people - the Latey Committee - decided that 21 was much too late in the day for you to grow up. But how much does the Latey Committee know of the society you want to create - whether, indeed, you want any part of their adult world? Is it a privilege to be admitted or a pain in the neck?