Preparing dark cuisine also requires a certain level of finesse.
Although it was his first time feeding shit, like feeding food, it should follow the same but opposite rules.
Feeding food involves finding the hidden desires of the other person, providing the right remedy, and not using other condiments haphazardly, otherwise it might provoke the customer's plan.
Feeding shit should be the same; finding vulnerabilities that the other has not exposed, compelling them to recall their own fragility and pain. Randomly using other condiments might even increase their strength.
Ren Suo logged into the intranet and revisited the paper "Demonization Analysis" to find the section on "Gradual Changes in a Demon's Character":