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The relationship between finger length and sexuality was only evident, however, in females, according to the report by researchers from the University of Essex, who examined 32 sets of identical twins with different sexual orientations. Typically in women, the index and ring fingers are similar in length, while in men there is a greater difference between the two fingers. While the nonstraight female twins had a lower index-finger-to-ring-finger ratios, the study did not find a significant difference in the male twins' finger-length ratios. The bottom line?

Back to Sexual health. Having unprotected penetrative sex is the most likely way to pass on a sexually transmitted infection STI. This is important, as some STIs do not cause any symptoms. Hepatitis A is a liver infection that's spread by a virus in poo.

Finger length may be an indication of sexual orientation, a controversial study has shown. Scientists from California found that lesbian women have a greater difference in length between their ring finger and index finger than straight women do. The same pattern was also found for homosexual men - but only when the researchers looked at those males that had several older brothers. The scientists from the University of California at Berkeley were testing a theory that higher levels of androgen - male sex hormones - in the womb influence both finger length and sexual orientation.

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