linguistic:translation
Male reproductive system

Most male marsupials, except for macropods and marsupial moles, have a bifurcated penis, separated into two columns, so that the penis has two ends corresponding to the females' two vaginas. The penis is used only during copulation, and is separate from the urinary tract, but is also used during urination. It curves forward when erect, and when not erect, it is retracted into the body in an S-shaped curve. Neither marsupials nor monotremes possess a baculum. The shape of the glans penis varies among marsupial species.

The male thylacine had a pouch that acted as a protective sheath, covering his external reproductive organs while running through thick brush.

The shape of the urethral grooves of the males' genitalia is used to distinguish between Monodelphis brevicaudata, Monodelphis domestica, and Monodelphis americana. The grooves form 2 separate channels that form the ventral and dorsal folds of the erectile tissue. Several species of dasyurid marsupials can also be distinguished by their penis morphology. The only accessory sex glands marsupials possess are the prostate and bulbourethral glands. Male marsupials have 1-3 pairs of bulbourethral glands. There are no ampullae of vas deferens, seminal vesicles or coagulating glands. The prostate is proportionally larger in marsupials than in placental mammals. During the breeding season, the male tammar wallaby 's prostate and bulbourethral gland enlarge. However, there does not appear to be any seasonal difference in the weight of the testes.