that the “cornerstone” paradigm has an expectation of difficulty built into it, while the “capstone” does not. Couples who marry young are expected to struggle and to come out stronger for it. Hence, the cornerstone model “doesn’t condone infidelity so much as it concedes its near-inevitability.” In contrast, he observes, “The capstone model is much less forgiving of sexual betrayal because it presumes that those who finally get around to marrying should be mature enough to be both self-regulating and scrupulously honest. … The evidence suggests, however, that the capstoners are more than a
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