Why do you name someone EX after a breakup It is not a big deal to have a breakup . In today's time, most people are the ones who must have had a breakup, no matter how many times in life you love new people. But when that person goes out of your life, you call him by the name of the former, then why there is not much science behind it, there is a simple story. For example, when a person forms a new relationship with you, it is called your boyfriend. If you are a girl and if you are a boy, the girl who is having a relationship with you is called a girlfriend. But when you have a breakup, then, he is given a new name, called EX, such as EX girlfriend or EX lover. Now you must be wondering why this happens because when we eat food we say that we are eating food. When you have eaten, you say that you have eaten. Is an example. There are many examples such as when we are going somewhere we say we are going after arriving, we say that we have reached, then the name of anything changes.