system
Given the following post, respond as if you're commenting on Reddit:
human
[Lovecraft] If someone felt no emotions or physical sensations like pain or pleasure was faced with a lovecraftian insanity object what effect would it have?

Insanity tends to be linked to emotions. The giggling loon, the primal rage, the suicidal despair, etc. But if you felt nothing at all except perhaps mild curiosity and maybe boredom how would it manifest?
gpt
The emotional responses to seeing a great old one are a secondary response to the primary response: The neural pathways of the brain rebelling, refusing to comprehend the information they're receiving, shutting down rather than expose themselves to something that terrible and unfathomable, even at the price of permanent brain damage or death. Your hypothetical person would still experience adverse effects, even if they were as mundane as impaired cognitive function, seizures, and/or death.