Hand-cranked tool resembles Raymond Loewy's 1933 pencil sharpener

This hand-cranked tool was inspired by Raymond Loewy's 1933 pencil sharpener.

(Via the World's Best Ever)

Science, sex, and your hands

Here's an interesting fact about sexual dimorphism: On average, if you were born a male, your hands are a little bit different from those of someone who was born a female. Most men have a pointer finger that is a little bit shorter than their ring finger. Most women have a pointer finger that's about the same length as their ring finger, if not a little longer.

People have noted this differences between the sexes for centuries. But what's it mean? Truth is, we really aren't sure yet. But it is correlated to a lot of awfully interesting things. In fact, some scientists think "the finger thing" (as I like to call it) is a hallmark of prenatal hormone exposure. Because of that, in the scientific literature, you'll find lots of examples of studies that try to find a connection between the finger thing and seemingly disparate traits, such as sexual orientation and gender expression.

We talked about the finger thing on a recent episode of the Sex is Fun podcast—what it's all about, what fingers could be telling us about people, and why it's maybe all just a bunch of hooey. Take a listen!

Also, for the record: My right hand has lady fingers. My left hand does not. How about you?

Sex is Fun

Image: Hand, a Creative Commons Attribution Share-Alike (2.0) image from teleyinex's photostream