I’ve found most of the “debates” on gay marriage annoying because most of the debaters seem eager to show off their ignorance of what their opponents believe. But Maggie Gallagher recently attempted to change this, and managed to provoke an excellent response from Reason’s Julian Sanchez which directly targets the marriage-for-procreation ideal, showing that in addition to lacking strong arguments in its favor, that traditionalists are wrong to claim that was once the sole motive for having such an institution.