Seforno: It teaches us that, even though the Yevamah is commanded to shame the Yavam who did not have compassion on her husband, she is not allowed to shame someone who is fighting with her husband. ¹

Rashi: To teach us that if two people enter into a quarrel, they will end up striking one another - because Shalom does not come from quarrels.

Sifri: To teach us that 'Anashim" is La'av Davka, and that the same Din will apply if women are fighing or if a man and a woman are fighting.

Bava Kama 88a: To incorporate Avadim in the Din of Boshes - since they are subject to Mitzvos. ¹

Oznayim la'Torah: Because generally it is brothers, who know each other's secrets, who come to blows. ²

Yerushalmi, Bava Kama, 8:3: It implies that if the wife of the second man emulates the wife of the man in the Pasuk, she is not subject to "Vekatzosah es Kapah". ¹

Bava Kama, 27a: It implies that the woman is liable for Boshes if she intended to wound the man, even though she did not intend to embarrass him. ¹

Bava Kama, 28a: It implies that if a Shali'ach Beis-Din causes embarrassment to a litigant who refuses to appear in Beis-Din he is not obligated to paty Boshes. ²

Yerushalmi Bava Kama, 8:3: If one did not even intend to wound, one is Chayav Nezek but not (Ripuy, Sheves or) Boshes ? for example, where one falls off a roof via a regular wind. ³

Sifri: It teaches us that "bi'Mevushav" is La'av Davka, and that the Din applies regarding any way that the woman intended to wound him and to embarrass him. ⁴

Rosh: They are his testicles - 'a location of shame'.