Some people, when eating fruit and finding a part of it has rotted, will cut away the spoiled portion and eat the rest, thinking that this makes it hygienic. However, experts in microbiology believe that even after removing the rotten part, bacteria's metabolic products have already been transmitted to the remaining part through the fruit juice, and some microorganisms may even have begun to multiply. The mold among them can cause mutations in human cells and lead to cancer. Therefore, if a fruit has even a small part that has rotted, it should not be eaten; it is better to throw it away.