Answer to Zenon, this question keeps on poping up..So the simply can been explained like this ..Take 4 class of milk and mix then in one jug, no try to seperate this,,can it be done..simpilary think this in terms of glass of milk as men and jug as women..I hope you get the message, but if there is one glass of milk you cant put it any four jugs it will be same milk..

Have u ever wateched Mamma Mia..it will explain..