The Mamu Mamu is the yukkuri equivalent of a vagina/uterus. It acts both as an orifice to accept another yukkuri's Peni Peni, receive the inseminating bean paste, and act as a uterus for developing offspring. Offspring who develop within the Mamu Mamu tend to be larger and more developed when born, though their birth carries greater risk to the parent and child. For further information about Mamu Mamu vs. Stalk births, see Reproduction. This article is a . You can help My English Wiki by expanding it.