"I am someone who's very liberal when it comes to drugs, for example. And I believe in decriminalizing many drugs," he says. "But do I want my son to be able to buy heroin at the pharmacy when he turns 16 or 18?" He adds that keeping a marriage together is one of the hardest things a human being can do in life. 'You can't just marry somebody having never seen it done and expect that you know how to do it'