Pain And Pleasure V03 Smasochist Lain Best Better -

If this refers to a specific , could you share where you encountered it? This would help in identifying the exact "write-up" or creator you are looking for. Why pain feels good - BBC

Layer 03 is a pivotal moment where Lain begins to modify her Navi with the Psyche processor

(pleasure) or because they are driven by biological impulses they don't fully understand. Pain as Reality

Gradually increasing the "pain" (difficulty/complexity) as the user adapts.