Women naturally sit comfortably with their legs closed because of their pelvic structure. The difference in pelvic bone structure is also what causes the natural male sitting posture to have the legs apart.

People are pissed off because the whole concept of "manspreading" takes a phenomenon with a perfectly simple explanation, and reaches instead for a baseless gender-politics-based pop-psychology explanation in order to demonise one sex.

FACT: That chair looks uncomfy as fuck for either gender.