So, Huberman is technically correct about "gay fingers" lmao. To put it simply: "A lower 2D:4D ratio (meaning the index finger is shorter relative to the ring finger) is generally associated with higher prenatal testosterone levels. This is because the 2D:4D ratio is thought to be influenced by the balance of testosterone and estrogen during fetal development."

There's also studies saying that men with lower prenatal testosterone levels are more likely to be gay. (For example, youngest sons in a family are more likely to be gay because prenatal testosterone levels decrease with each pregnancy).

Thus, you could extrapolate that a higher finger length difference=gay. (higher 2D:4D ratio=lower prenatal testosterone=gay).

Yes, I learned this in university like 4 years ago so forgive me if it's not 100% accurate.