Infedility

Even though the elements of infidelity is morally wrong in society, it is a way of hurting someone. However this could be a good thing in the sense that it is one way in which to hurt someone and so can be used as a means of getting revenge. Having an affair is also a lot more fun, the risk element that is attached to sneaking around makes the idea seem more intriguing especially when you can be with two people at different times without getting caught.