Costly signaling and fidelity

Not all dating advice is created equal. These articles examine popular guidance from relationship coaches, influencers, and self-help authors—separating evolutionary insight from pseudoscience and marketing.

  • Costly signaling and fidelity: 1950s marriage advice framed the husband’s moral code as something the wife must continuously maintain.

    Costly signaling and fidelity

    In 1953, Shailer Upton Lawton framed a husband’s moral code as mate insurance. A wife who invested heavily created the conditions for him to want a firm moral code and develop it himself. Without that ongoing investment, Lawton argued, husbands became vulnerable to any of the psychological reasons that lead…

Andrew King

Author of Costly Signals: The Evolution of Dating Advice. PhD researcher with 500+ dating guides from the 1800s to today. Why do we take romantic advice from strangers? I have answers.


Whether you’re a journalist, podcaster, or an event organizer, I’d love to hear from you. I speak on modern dating, evolutionary psychology, and a surprising history of dating advice.

© 2026, Andrew King