alphacent wrote:
I have read the theory about "finger-length" analysis that goes something like this:
Heterosexual females: ring and index fingers are about same length.
Gay females: ring finger is longer than index finger.
Heterosexual males: ring finger is longer than index finger.
Gay males: index finger is longer than ring finger.
You have those associations wrong. The second digit (2D, index finger) to fourth digit (4D, ring finger) ratio is typically 1:1 in women and 0.96:1 in men. Greater prenatal androgen (particularly testosterone) exposure is associated with a lower 2D:4D ratio, i.e. the index finger being shorter than the ring finger, with respect to the sex norm.
Low 2D:4D ratio is associated with higher male fertility, lower female fertility, athletic success, aggression (possibly strongly related to athleticism), lower risk of heart disease, lower risk of cancer, autism, homosexuality, bisexuality, gender identity disorder.
There are references to all of these on
http://en.wikipedia.org/wiki/Digit_ratio but
http://www.human-nature.com/nibbs/02/manning.html has a nice table summary.