Why is "lying trough" a dirty word?

The word "I grass" evolved from the word "I *", which originally meant very vulgar and obscene. Some modern people with low taste, in order to express their vulgar and vulgar attitude, are afraid that the social platform will not pass the examination, so they change the word to lie in the trough, so that the same vulgar people can understand the meaning. However, I didn't expect such a word to become popular, spread and used by many people and even become a common language. When expressing surprise, fear and happiness, some people will use the word lying trough, and even some girls will use this word to express it.

Some people say, why don't you have culture and walk the world in one sentence? This reason can be regarded as the reason why I love swearing. People who love swearing just lack the positive influence of culture and education. Whenever they express their views on things, they have nothing to say but swear words. Because of the lack of systematic culture and education, not only will they not express themselves, but they will also express themselves in disorder.

Another reason why people like swearing is that they are impetuous and have an indulgence. Just like farting casually in public, you just want to vent your unhappy emotions and don't want to affect the public and the bad environment. So many people like to say sand sculpture and lying trough. Although it is not as vulgar as the original words, it is also uncivilized behavior. It's just that the original word is louder than fart in public, and the changed word is louder than fart.

People's psychology has an angry side, and they have the impulse to call names when they are in a bad mood; People's physiology has metabolism, so they have bad sides such as excrement and urine and smelly sweat. If people want to meet politely, they must eliminate all bad things, such as physical and psychological. This is civilization. If, like an animal, he watches the other person shit naked and barks and barks like an animal, then he is not a person.