Not a new article but I came across this and thought it quite interesting that there are scientists out there who study the male human genitals (from a evolutionary psychology perspective). Why and how it evolved to ensure that the 'male' who compete with other males to ensure that their genes/offspring are passed onto the next generation. This is answered by the “semen displacement theory” of evolutionary psychologist Gordon Gallup from the State University of New York. To test their theories, the scientists even used 'artificial genitalia of different shapes and sizes' and different 'batches of realistic seminal fluid'. I won't go into the details (read it on your own) but the ending question was weird (and funny as well) when it posed the hypothetical question of whether it would be possible for a woman to be pregnant with a man she never had sex with.