This was a very subjective question because everyone's definition and attitude towards love was different. But generally speaking, you shouldn't start a relationship when you know it won't work out because it means that love itself isn't a healthy or sustainable relationship. The beginning of a fruitless love may bring endless pain and disappointment, which may have a negative impact on people's psychological and physical health. In addition, this fruitless love may also have a negative impact on the people around it, such as destroying friends or family relationships. But sometimes people may start a relationship that doesn't work out because they feel that love is a romantic experience or because they want to try a new way of life. In this situation, people should be as honest and transparent as possible and discuss future possibilities with their partners. If two people really love each other, they should work hard to overcome difficulties and build a sustainable and healthy relationship together. In short, knowing that love without results should not begin, some people may choose to try. They should be as honest and transparent as possible and discuss the possibilities of the future together.