In a recent Huckabee appearance, Mitt Romney said he'd "absolutely" support a constitutional amendment defining conception as the beginning of life. In addition to outlawing abortion, such an amendment could ban many forms of birth control, a fact Romney was seemingly unaware of when pressed on his position during a campaign event on Thursday. So tonight, armed with beer and female anatomy diagrams, Rachel Maddow invited Romney to her "Man Cave" for a crash course in how babies are made.