Spineless penises leads to bigger brains (this is a good one) ;)

Researchers in the faculty of medicine in Stanford university recently found out that big brains and a softer penis is the result of a DNA loss in our evolutionary road. By comparing the human DNA and chimpanzee's (our nearest evolutionary relatives), they found out that most of our differences are the result of the loss of a DNA sequence. Having monogamous relationships is apparently based on the loss of the penile spine. Animals like chimps and dogs, have a penile spine, which leads to a more competitive mating system.