人沒有狗忠誠

'Human lacks the loyalty of a dog,' highlights the idea that people are not as faithful as dogs, emphasizing loyalty and devotion. In various cultures around the world, dogs are considered humans’ friends who are incredibly loyal to their owners. So, this implies a negative view or criticism about human character regarding faithfulness, comparing them unfavorably with the fidelity and unwavering companionship expected from pets such as dogs.