The above poster is an idiot.^^ The above article isn't even research, it's one persons opinion on conclusions drawn by others. The writer uses terms like "I" and "too my knowledge", which excludes it from any form of study. The article supports nothing, but one persons thoughts.
"David P. Barash, an evolutionary biologist, is a professor of psychology at the University of Washington. His most recent book is Homo Mysterious: Evolutionary Puzzles of Human Nature (Oxford University Press, 2012)."