>>57148789Because it's an abstraction. The rest of the times, it's the result of a deliberate action by the player at the controls, thus has to be tiptoed around, because the default audience likely doesn't know what reproduction is like mechanically, thus they can't reference it or any part of the process. So they jump through hoops, while adding sidequests presenting Japanese folklore myths as actual in-universe events (a version of the Yuki-Onna story details how the creature spares her husband's life upon speaking of the meeting in the mountain, out of respect for the children he fathered on her) that happen to hearken back to the concept lore written for Gen 4, by having direct human/pokémon breeding (which most Japanese teens and adults likely know about the folk tales making them far more likely to be able to understand the inference).
