‘The bizarre idea that there may be genetic method to feminine aesthetics receives support from biologists who measure to the millimeter how symmetrical animals are. Potentially symmetrical traits include the outer most eyes on the fanned-out tails of peacocks, side feathers of a swallow’s tail, two wings on either side of a male scorpionfly, or, in the case of humans, left versus right ear lobes, cheekbones, jawbones, and elbows.
      Scarcely perceptible lopsidedness in bilateral traits like tail feathers is assumed to be a stress-induced deviation from a perfectly symmetrical ideal body plan, brought about by environmental insults- pathogens, food shortage, or inability to metabolize critical nutrients- thus interfering with the organisms development. Indeed, the methodology for measuring such “fluctuating asymmetries” (small, random deviations from perfect bilateral agreement in what should be perfectly symmetrical traits) was initially developed by wildlife biologists worried about the toll on animals taken by changes in their environment, pollution, diseases, or new parasites.”

- Sarah Blaffer Hrdy, Mother Nature

Bubbles, the Singing Puppet:
http://www.biertijd.com/mediaplayer/?itemid=3076