The sunk cost fallacy is most dangerous when we have invested a lot of time, money, energy or love into something. This investment becomes a reason to carry on, even if we are dealing with a lost cause. The more we invest, the greater the sunk costs are, and the greater the urge to continue becomes. Relationships are not immune to the sunk cost fallacy, especially when one believes that having invested a lot of time, money, energy or love into the relationship, it would not b