I wrote the word intellect but I think the concept I was trying to describe is better stated as "subconcious".
There is a certain amount of processing going on in the mind before the handoff to the rational, conscious self. I wonder if pleasure and pain are differentiated at the subconcious or conscious level.
The examples you provided are of the type "optical illusion" while I am asking about disturbances within the mind. Perhaps the response is the same.
I am not a scholar and occasionally find it difficult to express a concept, so I appreciate the precision with which philosophers use language.