Yes, folding knives can be used to cut fruits. Folding knives are versatile tools that can be used for various cutting tasks, including slicing fruits like apples, oranges, or melons. However, its important to consider the blade type and sharpness when choosing a folding knife for cutting fruits. A knife with a sharp, thin blade, such as a paring knife or a utility knife, is typically more suitable for precise fruit cutting. Additionally, ensure that the knife is clean and properly sanitized before using it to cut fruits to maintain hygiene.