On a cold winter day, a group of porcupines huddled together to keep warm in order to avoid freezing. But they were soon stung by each other's hard thorns. In this way, they are forced to separate. But in order to keep warm, their bodies came closer again, and the hard thorns on their bodies stung them again. These porcupines were tortured repeatedly by these two pains until they finally found a distance that was just right enough to tolerate each other.
Conception: