In her book "Why We Love: The Nature and Chemistry of Romantic Love," Helen Fisher explores the influence of testosterone on male behavior in romantic relationships. She asserts that men who have elevated levels of this hormone are less likely to marry and may engage in infidelity at higher rates. These traits suggest a potential link between testosterone levels and commitment in romantic partnerships.

Additionally, Fisher notes that high testosterone levels may correlate with increased occurrences of spousal abuse and elevated divorce rates. This insight provides a biological perspective on relationship dynamics, suggesting that hormonal factors can significantly impact emotional connections and social behaviors in men.