What does it mean that a glove is not suitable for dairy foods?

It can not be used in contact with foodstuffs such as whole milk, partially dehydrated milk and partly or wholly skimmed milk and beverages, fermented milk such as yogurt, dairy products and similar products, cream, melted cheese (soft cheeses, cottage cheese and the like) , Cheese preserved in aqueous medium (feta, mozzarella and the like).