Constellation Tucao: Why did Constellation 12 become single dog?

Scorpio is the stupidest.

Scorpio:

Scorpio people are always so extreme. They have erin brockovich's perseverance. They never hide their desire for power and wealth. Scorpio is the constellation closest to human nature. They dare to face their inner desires, never avoid them, and rarely show humility. For them, their nature and instinct are really vivid.