The 'White House Down' star became emotional to see Dewan in pain when she was struggling to deliver their daughter through the painful labor, reported Ace Showbiz.
"I probably went to the bathroom four times and had a crying fit. Like, I'm just like, I don't know what to do! It's like someone's hurting, someone that you love and you can't do anything about it. You physically cannot help.
"There's a real reason why God did not give (men) the ability to have babies, because we would not be able to do it. I don't know how (women) do it. It's a real thing. It's like National Geographic animal-style for real. I don't get it," he said.
"I've never been so excited when something poos. I just get so amped up because I'm in the game now... I've gotten so good at changing diapers, swaddling and get it back before she cries."
The couple were blesses with a baby girl on May 31, 2013.