If you think about it, stuff like incest and loli love is ancestral in many places (rome , germanic tribes, eastern europeans, even nomadic asians, east asians, turkics and the various muslimas is one of many examples) and people probably carry such fetishes in their DNA, like memories.

Somewhere along the line these people found out that DNA memories are real and are spiritually attacking you this way by banning things that are naturally align with your ancestral predispositions. When you are chronically mis-aligned from your ancestral "way" it creates a repressed neuroticism that makes you unproductive or leads you to endless "self discovery" culminating in a general sense of emptiness you cant explain. （ ´_ゝ`）