Cruelty to animals, also called animal abuse or animal neglect, is the intentional infliction by humans of suffering or harm upon any non-human animal, regardless of whether the act is against the law. More narrowly, it can be the causing of harm or suffering for specific gain, such as killing animals for food or for their fur; opinions differ about the extent of cruelty associated with a given method of slaughter. Cruelty to animals sometimes encompasses inflicting harm or suffering for personal amusement. Billions of animals, mostly frogs are killed every year expressly for educational use. This action leaves the impression that animal lives can be wasted if this benefits humanity. Laws concerning animal cruelty are designed to prevent needless cruelty. Divergent approaches to such laws occur in different jurisdictions throughout the world. For example, some laws govern methods of killing animals for food, clothing, or other products, and other laws concern the keeping of animals for entertainment, education, research, or pets.