Though there's an 18-year age difference between his first son, Indio, and second son, Exton, who was born in February 2012, Robert Downey Jr. isn't panicking about taking care of a newborn. "Well I find it easier," he recently told Jay Leno on the Tonight Show. "I'm not smoking pot [all the time], which [makes it] difficult when you're changing a diaper and you're stoned."

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