mmm, apparantly, the more symmetyrical your body and face, the less distorted it is by disease, and thus gives a signal to the opposite sex that we are healthy, and therefor a good potential mate.
this statement is backed up by this site, and it also provides an answer for your “motion” question
I would think for purposes of motion, the most symmetric and “in sync” motions would be the most efficient and therefore the most desirable to perform. It is only logical to assume people would strive for the most efficient way to perform a task, which is why you don’t see people walk or run herky jerky on purpose. The least wasted motion the better.
For motion, a smoothe motion is easier to predict, and less stressfull in brain activity to watch (the brain both computes what it the eye gives it as information, and computes expected trajectories from that, these expected trajectories will be closer to the later observed motion if the motion is smoothe).
Also when injured it becomes very difficult to move smoothly, so non-smoothe movement could be taken as a sign that the moving person or thing is injured, which again will seem negative to us if we associate with the moving thing.
Cheers, Bippy
Originally posted by yme
So if someone has a crooked nose, does this mean they are unhealthy?
Well, not necessarily, but it MIGHT mean they lost a fight and were not as strong as the one with the straight nose. Remember you’re dealing with subconscious issues here. Animals will sometimes shun or attack a member of their own species who is different, injured, or deformed. I once had 3 cats. The ones with white feet HATED the one who did not have white feet. None of them were related, but my guess is the white-footed ones thought the solid colored one was abnormal.
The animals (which applies to homo sapiens) who prefer lopsided mates are more LIKELY to select a mate with some defect or injury, resulting in a higher percentage of less robust offspring, thus breeding out the tendency to prefer lopsided mates. A vast oversimplification, but I’m sure you get the gist of it.