Humans

For Big Bubble, the mammalian bipeds of Earth are by far the most unpredictable sapient species, which makes them the most interesting to bang. And while they are not particularly large (with some genetically modified exceptions), their remarkable stamina and diversified deviancy makes them even more of a treat.

There are a great number of humans on the Wonderland, considering that the CEC was co-founded by their species, so the Princess is not at a loss for prospective partners.