Scientists Link Finger Ratio To Sexual Behavior In Rats. Could It Apply To Humans?
Study: Okayama University researchers found that in rats, the length of the second and fourth digits (2D:4D ratio) predicts sexual activity and scent-based mate preferences. Key Result: Male rats with shorter second digits ejaculated faster, more frequently, and showed stronger preferences for female scents. Human Link: The same digit ratio has been studied in humans as a marker of prenatal hormone exposure linked to sexual orientation. Why It Matters: This rat model may help scientists better understand how early hormone exposure shapes sexual behavior and partner preference across mammals. ….[READ]
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