The 'Contagion' actor has three daughters, Isabella, five, Gia, three and Stella, 14 months with his wife Luciana Barroso and is also stepfather to her daughter Alexia, 12, from a previous relationship and the Hollywood hunk says his family are the most important part of his life.
Asked by Vanity Fair for their Proust questionnaire, when and where he was happiest, Matt answered: "In our bed, making our children, and in the hospital watching them being born."
Matt also revealed his personal motto is "Don't be a d-bag."
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Matt has previously revealed he loves being surrounded by females even though his daughters find it easy to manipulate him.
He said: "When Isabella was 18 months, she was trying to get a treat out of me. I said no and she asked me again so I caved in.
"Then my wife came into the room. Isabella looked up at her mother, shyly smiled and put her head down. I knew that at 18 months old, this creature had control over me.
"Men don't have a chance. I feel we're such different species."