When you want to cook a frog, they say, don’t throw it into boiling water, since it will only jump out. Instead, place Froggie in a pot with tepid water and, ever so slowly, continue to increase the heat. When the poor fellow finally realizes he is being cooked, he’ll have no more strength to resist. Radical gay activists must have taken a cue from this tale, because it seems to be the tactic of choice for advancing their cause: the normalization of homosexuality in Western culture. Normalizing homosexuality would at first seem to be a quixotic task, given that...