Apparently there are creatures called bonobos on Earth.

Maid A: “Earth is hundreds of millions of light years away, and it’s the planet where lady goes to research high-leg clothing.” Maid B: “Bonobos are pacifists, and they engage in sexual acts to relieve stress regardless of the gender of the other one… They’re similar to us, aren’t they?” Maid C: \"However, it seems that they are not our ancestors. It is technically impossible to bring earthly creatures to this planet...Items are often brought in by lady, though.\" Lady: “That’s why our ancestors still remain a mystery…That’s interesting, isn’t it?”