A new study published in Biological Psychology has found that higher testosterone in men leads to a higher rate of infidelity.
The sample was 224 middle-aged healthy men currently in a relationship. They completed questionnaires on relationship characteristics, infidelity, and sexual functions, and later provided overnight-fasting saliva samples for to measure their testosterone.
The results: 37.5% of men answered having been unfaithful in their current relationship at least once or more. The researchers found a positive association for the frequency of the unfaithful behavior and testosterone levels.
“The main message is that testosterone is associated with infidelity and that higher testosterone concentrations appear to be associated with a higher probability of being unfaithful,” study author Andreas Walther, a professor at Technische Universität Dresden, told PsyPost.
He added that testosterone is not the only thing that matters when it comes to cheating, however: “It is important to note that higher testosterone levels are not a deterministic factor that necessarily leads to infidelity, but only increases the probability.”
Another new study recently published determined that if you’re that if you’re cheating on your spouse, you’re also twice as likely to be involved in misconduct at work.