A doozy of a mishnah, especially with regard to gender wars. What mitzvot are women obligated in, and what mitzvot are they not obligated? With some specifics for men, boys, fathers for sons, sons for fathers. (How to swim, circumcision, etc.) And where do the mothers and daughters fit in? Plus, the rules regarding teaching Torah. (Where are the girls?) Also, the story of the demon in Abaye's beit midrash, and R. Acha bar Yaakov's vanquishing of it.