Why do people — both men and women — cheat on their partner? Blame it on biology.
Research by evolutionary biologists indicate that both men and women resist their biological programming when they try to be monogamous — something that must be learned, not something that comes natural. Depending on various factors in our DNA and brain chemistry, some are even more likely to cheat than others.
The theories in this video lend some insight — or at least a good excuse — for the next time you get caught with your hand in the cookie jar.