A man always feel safe, free in his own house, his own 'castle'. He is free to do anything he want, because nobody has the right to judge him. If he wants to listen music with 100% volume, nobody stands in his way. A man's house is also his sanctuary, not only his castle.
A man, in his house, feels like a king, he can control all the house. A man's house is his castle for the simple fact that he is free, it's about freedom
