Vittorio Gassman, Knight Grand Cross, OMRI, popularly known as Il Mattatore, was an Italian theatre and film actor, as well as director... (wikipedia)
Acting is not that far from mental disease: An actor works on splitting his character into others. It is like a kind of schizophrenia.
In every real actor, there is a need to feel for a few hours like the center of the world. Egocentrismo, we say in Italian.
A totally healthy actor is a paradox.
Men don't understand anything about women and women understand nothing about men. And it's better that way.