「Dr Gur-Arieh is leading the MapDung project that is seeking to gain a richer understanding of how our species began to use this remarkable material. There is good evidence, for example, that Neolithic people in the area of the Middle East known as the Fertile Crescent began burning dung as a fuel in their hearths, she says.」
[ https://ec.europa.eu/research-and-innovation/en/horizon-magazine/neolithic-remains-help-sniff-out-earliest-human-use-dung 2022-08-23 ]
The oldest style of oven, that of digging a hole in the soil, adding burning embers to the bottom, then perhaps some green wood to prevent scorching, and on that placing a pot with a secure lid…backfill with dirt in order to retain the heat, and wait until the pot contents are cooked and tender. Refers to the dutch oven-style of long time, slow cooking by burying a covered pot with soil after placing it over a bed of embers.
Dried cattle and bison feces were long used as fuel for COOKING FIRES, known colloquially as 'buffalo chips' and 'dung cakes.'
「Our Stone Age ancestors must have been very familiar with the smells of excrements. Hunters would have used those smells as other carnivores do, to locate their prey. Dogs joined human communities something like 30,000 years ago. Around 10,000 years ago, the first settled agricultural communities domesticated goats, sheep, cattle, and horses to take advantage of their milk and meat, hair and hides, and their plow-pulling muscle power. Archaeological remains indicate that their dung was used as a building material and fuel for fire, uses that live on today in less industrialized parts of the world, along with fumigation to eliminate insect infestations and even recreational cow “chip” throwing. Excremental smells must have permeated the life of the early farmers…」
[ https://www.wired.com/story/history-poop-is-really-history-technology/ 2022-08-23 ]
The hottest external place on the body of a human being is the anus:「Rectal temperatures are considered most accurate indication of the body's temperature. Oral and axillary temperature readings are about ½° to 1°F (0.3°C to 0.6°C) below rectal…」
[ https://health.clevelandclinic.org/thermometers-how-to-take-your-temperature/ 2022-08-23 ] Traditionally, kitchens were the place to find the slaves with the most talents for preparing hot meat, and kitchens are still the place where meat is heated. As an obvious Chinese euphemism for anal sex「flaming erection in pursuit of service provider/sex slave (匕 so popular in dynastic China), with feces.」

External source definitions …excluding politically incorrect concepts and other meanings deemed offensive today; may include extended definitions, euphemisms, and mnemonics)
Chinese: kitchen stove; furnace
Japanese EDRDG: kitchen range, cooking stove
Unihan extended: kitchen stove, cooking stove