Friends with benefits, also known as FWB, is a casual relationship. To put it simply, a two-way booty call. It’s supposed to be fun and sex, and no one should be thinking of a future together or catching feelings. Though those are the rules of this engagement, let’s face it, people are complicated. In some relationships, people end up breaking these rules. What started as meeting on free online dating sites for casual hook up evolves into something more. Whether you want …