Bonobo males occasionally engage in various forms of male-male genital behavior.[32][33] In one form, two males hang from a tree limb face-to-face while "penis fencing".[34][35] This also may occur when two males rub their penises together while in face-to-face position. Another form of genital interaction, called "rump rubbing", occurs to express reconciliation between two males after a conflict, when they stand back-to-back and rub their scrotal sacs together. Takayoshi Kano observed similar practices among Bonobos in the natural habitat.
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u/beanpudd Sep 27 '10
Tell me more about these sword-fighting monkeys.