It was only in practice, when wood-fire was only fluel mediam of cooking. So, the mud coat on the cooking pot diverts carbon out and the food becomes healthy and delicious.
The important thing is that you give them utensils which are safe and won't damage your cookware if it's teflon coated. They would need a whisk,a ladle or two, and a spatula. Silicon spatulas are often good in place of whisks and less likely to damager your cookware.
Copper
Marination is the process of soaking foods in a seasoned, often acidic, liquid before cooking
The most popular and widely used material for cutlery is steel, an Iron based alloy. Alternatives include: Titanium alloys, ceramics, plastic, glass, flint. List of the most popular cutlery steels with their composition and other pertinent information in the link below.
every 4 hours
Ocher
Every hour
Sure, it is often placed or injected under the skin though.
There's no scheduled time frame to replace household utensils. Replace them when they break, wear out or deteriorate to the extent they cannot function properly or cannot be cleaned.
Chopsticks are widely used as eating utensils in Japan.
to make fabrics resistant to water,stains and dirt
Long haired do not so often, short coated do shed hair quite often.