They're always coming up with something.
Gay men are more likely than straight men to have a counterclockwise whorl.
Gay men and straight women have an increased density of fingerprint ridges on the thumb and pinkie of the left hand.
The index fingers of most straight men are shorter than their ring fingers, and for most women they are the same length or longer. Gay men and lesbians tend to have reversed ratios. http://nymag.com/news/features/33520/