An artist who is using brush and ink will often control the value of the ink by a. using different values of paper b. diluting with water changing the drawing tool
c. diluting with water d. scratching the surface of the paper

Ithink the men do it because the women work very hard, especially during childbirth. as for whether textiles are a "female-only" art, certainly not! there is no such thing as a job the other gender can't do (pardon my bluntness).