Long index fingers

[Halb]

Why Men's Ring Fingers Are Longer Than Their Index Fingers: Male-Female Ring Finger Proportions Tied to Sex Hormones in Embryo

"The discovery provides a genetic explanation for a raft of studies that link finger proportions with traits ranging from sperm counts, aggression, musical ability, sexual orientation and sports prowess, to health problems such as autism, depression, heart attack and breast cancer."

http://www.sciencedaily.com/releases/2011/09/11090...