it ...doesn't do the fetish right, I mean its by nature weird. like do alot of people have a fetish of girls shitting out their personality?
then he kills the personality, in something of a violent manner, and scat and guro tend to get downvoted. Destroying the personality is wrong, you mold the personality into a dildo when you jam back into her ass periodically so she can be embarrassed at the sow she has become.
otherwise What is even the point of using the idolmaster girl?
you can also have like several girls and mind break one of the girls then shove her personality into other girls so you can use the mind broken girls personality in the new girl body.