The Liberty Counsel's Mat Staver explains to the CPAC audience that "same-sex marriage sets forth a fatherless policy" and says that you don't need a bunch of scientific data to know that that is bad. After all, kids without fathers tend to fare poorly ... and if you need proof, all you have to do is take a look at the prison population.
Thus, the logic seems to go, letting two women get married will lead to a whole generation of fatherless children who will inevitably become violent criminals:
