system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do some forms of pain, like stretching a sore back or picking a scab, feel so incredibly satisfying ("hurts so good")?
gpt
I don't think there's a simple, single explanation to all of the situations you're asking about, but in regards to stretching a sore muscle, your movement pushes your body to the pain threshold, which draws your attention to it, and then you release. The pain dissipates so quickly, the relief hits you like the most sublime freight train.