Snakes

Perhaps the visitor who visits the zoo will be struck by nothing more than those snakes imprisoned in their glass houses. Despite the softness of its texture and the beauty of its appearance, it inspires some disgust and hatred in the soul, and despite its imprisonment and safety from its evil, the heart shakes in fear of it. Perhaps the secret to this are the prevailing beliefs that people have passed down from generation to generation about its lethality and betrayal, until it is mentioned in many similes. The book and the imagination of the poets, despite the fact that the heavenly books preceded them in mentioning them.
This may be due to their natural shape, their standing upright, neither blinking nor clicking, and the constant, rapid movements of their tongues, and people's mistaken belief that they are their stinging organs, so you see a strong fear of them in the hearts of adults who knew something about them, but young children do not understand a little or a lot about them. Likewise, young monkeys may see snakes crawling and are not afraid to approach them, touch them, and play with them.