reimu:yu~~why this happened??it can't take it easy at all!!~~ marisa:reimu please don't rub-rub!!I will die as alice if I rut!! patchi:mukyu~~alice please stop easy!!it's gonna run out!!yu~~yu~~yu~~~ alice:penipeni...penipeni....
a institute reports ,after castration,yukkuri's wound will get cured in two days,if it ruts in that time,the death rate reachs up to more than 97 percent
Wasn't really torture. It was a practical way for them to slow down the yukkuri population growth without excess cruelty. This is just a case of them being too dumb to live.