[Papyrus's face twitches in a smile, even despite the staring and daring to confess to things, when Sans adds 'metaphorically.' It's seeming like there are some very real, very small, very not metaphorical switches in him, uncomfortable as that is to contemplate.]

I don't know if I can convincingly not want to remember things... Even though there are, things I wish I didn't know in the first place. [Like the human, and their rampage. Or how it felt for his bones to dissolve, twice. But he's already experienced not remembering that, and remembering it all over again, and it was... not enjoyable.]

Maybe hacking myself? It could take a while. I've mostly been working on the machinery, not the code... [Since, emotionally, it was more comfortable to feel like he has a prosthetic body than to think of himself as a robot with a skull.] But if this lasts a while, I might figure it out. [Assuming it's not the kind of function that's deliberately obscured, hard to switch off as a fail-safe against sabotage.]