アニメ版でオスの特徴が明らかだった、または一人称が「オレ」であったフレンズの股間のオスの特徴。
耳にしろ尾にしろ、元動物の特徴がモロに出るんなら生殖器が付属した場合も元動物のソレがモロについてるんだろうなぁって。

For "Friends" (characters) who clearly displayed male traits in the anime version—or who used the masculine first-person pronoun "ore"—what would their genitalia look like? Given that other features, such as ears and tails, are directly inherited from their original animal counterparts, it stands to reason that their reproductive organs would also be those of the original animal.