Patchouli knows full well that yukkuri don't have the proper organs to enter a menustral cycle.
She just wants all the sweet-sweets for herself.
You go, Patchy.
Wa-... ea-... mo-...Reimu can't take it easyThat's mister menstruation. This is because Reimu has turned into a proper LADY.Yayay! Reimu loves sweet sweets!Congratulations Reimu, tonight we are having sweet sweets!Yuhaa... why is mister bean paste coming out from my mamumamu? How shameful...Yuyu! Mister menstruation take it easy