Modern evolutionary theory is based upon the idea that human beings are “designed” (their term) to be promiscuous. The basic idea is that women have sex with multiple men until they find one with the best genes. And men have sex with various women until one chooses him to father her child. Men are seen as being driven by the desire to pass their genes on to the next generation, so they search out women who will give them the greatest opportunity for success.
A recent book by the founder of the Medical Institute for Sexual Health, Dr. Joe McIlhaney and his co-author Dr. Freda McKissic Bush, calls this theory into question. Their book Hooked: New Science on How Casual Sex is Affecting our Children shows that just the opposite is the case. Rather than being “designed” for promiscuity, human beings are actually designed to be sexually monogamous with one mate for life.