An interesting new study suggests that the length of a woman’s fingers could actually be a strong indicator of sexual orientation. Published in Archives of Sexual Behavior, the new study reports it is actually quite likely that those women who have different lengths between their ring and index fingers are homosexual.
Now, the study only looked at 18 pairs of fingers, but this comparison was down with female identical twins where one was lesbian and one was straight. Examining this physical trait, the researchers concluded that, on average, lesbian twins—unlike straight twins—had fingers of different length. At the same time, they also note that these differentiations were only on the left hand.
Typically, the index and ring fingers are of similar length in women, but in men, there is usually a more notable difference between the two. Alternately, heterosexual sisters had ring and index fingers of similar size.
Related research, out of the University of Essex, notes that exposure to testosterone in the womb can help to explain why these fingers have different lengths, at least among women. You see when they performed the experiment among 14 sets of male identical twins they could not identify any links.
Study author Dr. Tuesday Watts explains, “Because identical twins, who share 100 percent of their genes, can differ in their sexual orientations, factors other than genetics must account for the differences. Research suggests that our sexuality is determined in the womb and is dependent on the amount of male hormone we are exposed to or the way our individual bodies react to that hormone, with those exposed to higher levels of testosterone being more likely to be bisexual or homosexual.”
On the other hand, it appears the opposite may be true among men. When investigating male siblings, the researchers said gay and bisexual brothers also had ring and index fingers while those of heterosexual identity had ring and index fingers of similar length.
Thus, Watts concludes, because there seems to be a link between hormone levels and differences in finger lengths, we may be able to ascertain sexuality simply by looking at a person’s hand. Perhaps most importantly, Watts comments, “Research suggests that our sexuality is determined in the womb and is dependent on the amount of male hormone we are exposed to or the way our individual bodies react to that hormone, with those exposed to higher levels of testosterone being more likely to be bisexual or homosexual.”