With their hyper-elastic (and soft) design, the lagomorph hybrid species of Sponella V made up for it's inability to contribute much beyond offspring when the milking districts were built. Still, they baffled population engineers with their complete resistance to orgasm-boosted milk production gen-mods. That is, until they realized that a bunny species, engineered to be fucked like titanium fleshlights and give birth in litters, also needed industrial-grade stimulation.