A great book that discusses this and a lot of other cognitive categories is George Lakoff's _Women, Fire, and Dangerous Things_. Highly recommended for everyon

A great book that discusses this and a lot of other cognitive categories is George Lakoff's _Women, Fire, and Dangerous Things_. Highly recommended for everyone that makes things that use categories, tags, criteria, &c.: https://en.wikipedia.org/wiki/Women,_Fire,_and_Dangerous_Things https://en.wikipedia.org/wiki/Women,_Fire,_and_Dangerous_Thi...