Utensils, for peoples who don’t wash their hands after they shit or before eating.
Travel much? Outside the white world? Customs vary widely, even in Spain, they don’t follow what you call Continental etiquette, differing on how you eat bread, where you place bread, where are your hands resting during mouthfuls we talk etc.
Most of these customs, including the Hindu “no left hand” rule, which is different from electromagnetism’s Right Hand rule, are historical, cultural or religion based conventions, as you point out. They mostly inhibit, rather than enable and are often unhygienic.
Yeah I put food in my mouth with a knife.