Technologies keep surprising us every day. Twenty years ago we went to bed and woke up with an alarm clock in our hands, and now it's been replaced by a mobile phone. Fifty years ago people all over the world used to go to libraries, and nowadays all the books you can ask for can be found on-line. It seems like technologies are great fun, but in fact you have to remember the rules of the game. For example, if your toilet is meant for your butts, make sure you are not going to using for some other parts of your body - otherwise the reaction will happen immediately!