How does the male opossum mate with the female opossum?

Yes, opossums have intercourse. Males' penises split in the middle, making a "Y" shape. This is because females have two vaginas, leading to two separate uteruses, and the males must fertilize each one. After a gestation period of two weeks, the babies are born, helpless. They must climb up to the nipple, where they remain attached all the time until the become big enough to leave it, enter the bigger world, and eventually be weaned.