This week we learned that Ashton Kutcher and Mila Kunis decided on a FWB relationship only, but somehow it turned into married with two kids. Our guest co-host, Twitter star, Nathan Sanders explains to Cooper how that switch happens in a man's brain. How is it that one day you are a player trolling for babes, and the next you are a fiercely loyal dad and husband? Also, what is the dad bar set so low for the DILF but not for the MILF?