06/19/2013 11:05 am ET

Jim Gaffigan Talks About His New Book 'Dad Is Fat' On 'The Daily Show' (VIDEO)

Jim Gaffigan stopped by Tuesday's "Daily Show" to talk with John Oliver about his new book Dad Is Fat. In the interview Gaffigan tried to come up with an explanation for how he ended up living in a two-bedroom apartment in New York City with five children. He claims his wife is just very fertile.

Find out exactly how Gaffigan's son inspired the book's title in the clip above.