Humans do this too, on occasion. Apart from the obvious but difficult-to-verify night club anecdotes, here's a well-known historical example: https://en.wikipedia.org/wiki/White_feather#World_War_I
On the other side of the coin, there's the fictionalized story of Lysistrata.
"[They], from the outrage on whom the war originated, with hair dishevelled and garments rent, the timidity of their sex being overcome by such dreadful scenes, had the courage to throw themselves amid the flying weapons, and making a rush across, to part the incensed armies, and assuage their fury; imploring their fathers on the one side, their husbands on the other, 'that as fathers-in-law and sons-in-law they would not contaminate each other with impious blood, nor stain their offspring with parricide, the one their grandchildren, the other their children. If you are dissatisfied with the affinity between you, if with our marriages, turn your resentment against us; we are the cause of war, we of wounds and of bloodshed to our husbands and parents. It were better that we perish than live widowed or fatherless without one or other of you.' "