>>824183memories are like the AI training data for your brain. if it's unethical to generate AI porn using training data from real photos of real people who did not consent to have their photos remixed in that manner, then it is unethical for your "brain" (neural network) to construct porn in a similar statistical manner using its memories.
that being said, nobody will know or care. except maybe God, if you believe in God. or maybe the people in the future who figure out the ultimate forensic technology and can reconstruct everything that happened in the past including your thoughts and dreams.