Finger Length as an Indicator of Sexual Behavior and Preferences

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Source: Earth.com
Finger Length as an Indicator of Sexual Behavior and Preferences
Photo: Earth.com
TL;DR Summary

A study from Japan found that in rats, the ratio of the second to fourth finger (2D:4D) can predict sexual activity and preference, suggesting a link between prenatal hormone exposure and adult sexual traits, with potential implications for understanding human behavior.

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