A show of hands
How much of our brain's gender is visible in our hands? Sanders and Waters (2001) found that performance on sexually dimorphic tasks was predicted not by sex, but by finger ridge count (dermatoglyphics). Most people have more ridges on their right fingertips than their left. "Male-favouring" tasks were better performed by people with more right ridges. "Female-favouring" tasks were better performed with more on their left fingers. Kimura and Carson (1993) found that the left-asymmetry was more prevalent in women and homosexual men than in the general population. Mustanski et al (2002) (with everyone's favorite "sex expert" J. Michael Bailey contributing) found that left-handedness was more prevalent in homosexual women than heterosexual women, but not in homosexual men versus heterosexual men. Mustanski found no association between dermatoglyphic asymmetry and sexual orientation. Williams et al (2000) is one of many sources to report a sexual dimorphism in finger length ratios that may reflect sexual orientation as well (see also: Rahman and Wilson, 2003, Brown et al (2002)).
Are you looking at your hands yet? In my previous life, I read palms a little. I even volunteered as a palm reader in a charity carnival in junior high. At that point, I was taking my cues largely from the patterns I learned from my mother and from books on palmistry. After college, I still read palms -- but at that point I was trading the readings for free drinks. I also learned to do the readings more as a "warm read" -- taking cues from people's reactions more than from anything I saw on their hands.
Are you looking at your hands yet? In my previous life, I read palms a little. I even volunteered as a palm reader in a charity carnival in junior high. At that point, I was taking my cues largely from the patterns I learned from my mother and from books on palmistry. After college, I still read palms -- but at that point I was trading the readings for free drinks. I also learned to do the readings more as a "warm read" -- taking cues from people's reactions more than from anything I saw on their hands.