In general, sleeping naked does not increase breast development. Breast size is determined by the individual’s physique and the level of sex hormones in the body, with some genetic influence. Usually after a woman reaches adulthood, the size of her breasts will be basically finalized and there will be no secondary development, i.e., the breasts will not be further developed by sleeping naked. Sleeping naked does reduce the burden on the breasts at night, because wearing a corset at night will have a certain pressure on the breasts, sleeping naked can help women relax their bodies and relieve pressure, but sleeping naked has no way to play the effect of breast enlargement. For adult women, the breasts are basically stereotyped, will not develop twice, want to enlarge the breasts can go to the regular hospital for breast augmentation surgery. In short, sleeping naked has little to do with the development of breasts.