Story perspectives

Genetic Link to Infidelity: Exploring Behavior Beyond DNA

2/15/2026

Summary

Story summary

The long version of the dopamine D4 receptor gene is associated with a 50% higher likelihood of infidelity.
Evolutionary biologist Dr. Justin Garcia explains that humans are not hardwired for infidelity.
He notes that genetic predispositions may influence cheating, but other factors also shape behavior.
Garcia suggests couples navigate these drives by introducing novelty into the relationship, such as shared experiences or open relationships, to sustain passion and connection.

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Story summary

The long version of the dopamine D4 receptor gene is associated with a 50% higher likelihood of infidelity.
Evolutionary biologist Dr. Justin Garcia explains that humans are not hardwired for infidelity.
He notes that genetic predispositions may influence cheating, but other factors also shape behavior.
Garcia suggests couples navigate these drives by introducing novelty into the relationship, such as shared experiences or open relationships, to sustain passion and connection.