Marisa: "Why don't you have a mamumamu! I don't care if we're married, if we can't have kids, I don't need you!"
Reimu: "Why can't you have kids by rubbing faces? Are you impotent? Incompetent? I don't care if we're married, if we can't have kids, I don't need you!"
Well, apparently in that world there are both. Or Reimu had a run-in with the Yun-Yah castration kit; although then it should have known what a mamumamu was.