Rubbing your breasts will not necessarily make them bigger. The size and development of breasts are related to factors such as heredity, acquired nutrition and environment. The developmental period of breasts is during puberty. Normal growth of breasts requires sufficient sex hormones to stimulate the mammary glands. If you pass puberty, the size of your breasts is basically fixed, and rubbing your breasts to make them bigger results in a very effective way. If one’s body is thin and weak, then the breasts are not too plump and taking breast rubbing will not result in bigger breasts. For teenagers, who want to make their breasts bigger, it is recommended to strengthen the chest exercise, such as doing chest expansion exercise, swimming and so on. At the same time, appropriate massage of the chest, in order to promote blood circulation, strengthen the metabolism of the chest, may promote the development of the chest. In addition, the diet should pay attention to supplement protein and other nutrients, which is conducive to the development of breasts.