"Research published in Current Biology asked volunteers to guess the direction of motion of figures that were represented only by points of light placed at critical joints. (Similar to the motion capture process used to make movies like Avatar in which a real person moves around with points of light attached to hips, elbows, shoulders, knees etc, and a computer records the movement of the lights.)
When watching the points of light that represented a moving figure, the volunteers said that the figures made by men were approaching, while the figures made by woman were retreating."
I have looked all over the internet to read the actual study and have only been able to find articles that reference it. And I am always looking for research that can help me understand the 'why' behind this question. If you have resources or research on this topic, please include it in the comments.