Menstruation  

“Contact with [ menstrual blood ] turns new wine sour, crops touched by it become barren, grafts die, seed in gardens are dried up, the fruit of trees fall off, the edge of steel and the gleam of ivory are dulled, hives of bees die, even bronze and iron are at once seized by rust, and a horrible smell fills the air; to taste it drives dogs mad and infects their bites with an incurable poison.”--Pliny the Elder

"In 1978, Gloria Steinem wrote a semi-satirical essay for Ms. titled "If Men Could Menstruate" in which she imagined a world where men menstruate instead of women. She concludes in the essay that in such a world, menstruation would become a badge of honor with men comparing their relative sufferings, rather than the source of shame that it had been for women."--Sholem Stein

"Some organizations have begun to use the term "menstruator" instead of "menstruating women", a term that has been in use since at least 2010."--Sholem Stein