A video posted to YouTube of a father laughing with his three-month-old baby has gone viral online.
The father asks his son why he is always trying to headbutt him. The baby responds with a hearty cackle.
The dad responds with "“Oh My God, I love it. I love you. “This is your first big laugh, you know that? And all I’m trying to do is imitate you.”
The baby laughs even more at that, which makes the father laugh, which makes the baby laugh, which makes the father laugh, and well, you get the idea!
The video quickly racked up hundreds of thousands of views online.