Blackening the teeth was actually a thing in Japan back in the day.
<Ohaguro (which may be translated as ‘blackened teeth’) is a practice in which people (usually women) dye their teeth black.
<It is undeniable that traits deemed attractive and beautiful are often dictated by a society, and until the end of the 19th century black teeth was regarded as a sign of beauty in Japan.
<The traditional method for obtaining black teeth through the practice of Ohaguro involves the ingestion of a dye in a drink called Kanemizu. To create the dye, iron fillings are first soaked in tea or sake with vinegar. When the iron oxidizes, the liquid would turn black. The taste of the dye is said to be harsh, hence spices such as cinnamon, cloves and anise, would be added to it. This dye would be drunk, causing the drinker’s teeth to turn black.
<n order to keep the teeth black, the process would be repeated once a day or once every few days. The results seem to have been permanent, as there are skeletons from the Edo period whose teeth are still black due to the practice of Ohaguro.
The Allure of Blackened Teeth: A Traditional Japanese Sign of Beauty | Ancient Origins: https://archive.vn/AD5l4 / https://web.archive.org/web/20201006065903/https://www.ancient-origins.net/history-ancient-traditions/blackened-teeth-traditional-005544
Ohaguro: The Beauty of Blackened Teeth in Old Japan | LIVE JAPAN travel guide: https://archive.vn/UsEzf / https://web.archive.org/web/20171126163237/https://livejapan.com/en/article-a0001026/
That being said, I am pretty sure idiots (self-loathing hwhites and niggers) could be influenced to blacken their teeth to show how anti-racist they are, or just because they fall for the black is beautiful maymay.