What do you mean, don't ride a three-legged horse, don't get a two-headed snake?

As the name implies, don't ride a three-legged horse, a three-legged horse or a lame horse. Don't mess with the two-headed snake: don't mess with the two-headed snake. Let's explain it in detail: a two-headed snake, is there such an animal? The answer is yes, it belongs to mutation, that is, the snake with genetic variation. Since ancient times, snake venom has been famous. Words like "femme fatale" all describe snake venom. A snake with one head is so poisonous, let alone two heads. Then we can understand the two-headed snake as a kind of abnormal malice, which becomes: don't do things you shouldn't do, don't provoke people you shouldn't provoke. In fact, these old sayings are easy to answer as long as you know what you mean. It should be noted that some ancient words need an allusion to support their meaning.