system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does cracking your knuckles/back/neck feel good?
gpt
Usually when you crack your joints you relieve the pressure that was building over the cartilage, which mostly happen because your joints aren't that tight anymore as they were when you were a kid, so they start "slipping" to a position where they were not actually supposed to be, but are not entirely wrong (as in a dislocation, which usually hurts). Pressure, most of the times, is not painful, just unsettling, so when you release it you get that pleasury feel.