https://d3i71xaburhd42.cloudfront.net/7e6b55c1f1546f965d17ab99957776b64e25a2e9/15-Figure11-1.png

oh and what about the following, dazzlenation?....LOL....see previous post....go figure:

 

as imagery goes....it is all a bit 'phallic', isn't it?