When Papyrus starts going on dates Sans finds himself very uncomfortable with the idea of Papyrus being in a romantic relationship with anyone. "Am I just being over protective?" He's so troubled he asks friends for help and then starts questioning himself and his feelings toward Papyrus He gets an idea when he notices Papyrus's mailbox, which was always empty... "Oh this was bad..." "I should have never wrote that damn letter...I'm the worst!" "And now look what I have done to you..." Papyrus X Sans if you don't support Fontcest you don't have to read it...