To save some people a minute, from Wikipedia:
The Great Male Renunciation is the historical phenomenon at the end of the 18th century in which wealthy Western men stopped using bright colours, elaborate shapes and variety in their dress, which were left to women’s clothing. Instead, men concentrated on minute differences of cut, and the quality of the plain cloth. Coined by British psychologist John Flügel in 1930, it is considered a major turning point in the history of clothing in which the men relinquished their claim to adornment and beauty.
This. How can we be completely certain that something isn’t damaging over the long term. I’m not anti fluoride, but healthy debate and scepticism is a good thing, especially when we’re all forced to consume a substance with the only alternative being dehydration and death. People need to be free to make their own choices.