Eh. He thinks straight people shouldn't marry unless it's to have sex and reproduce. Accepting the premise that marriage is only the confirmation of a commitment for procreation, it logically follows that gay marriage doesn't make sense. People like me, straight and married but with no intent to procreate, are just as bad. It may not be modern thinking, but it's fair and consistent. 90% of "proper" marriages don't count either, of course, and that's a part many American catholics won't accept. But at least it's clear and fair, if not very open or accepting of love in all its forms.