Such respect came not from a command but from their awe and reverence. Although such a formal restriction is not placed upon us, a healthy sense of awe is essential to our relationship with God. Without any psychological expertise, we can detect some reasons, none of which justify the profanity. Insecure teenagers want to prove their macho qualities, their daring nature, and their rebellion by shocking speech and actions. Most of them find it easier to gain this attention by swaggering speech than by their actions.
Many persons never mature enough to cease such aggressive adolescent self-image building.
It becomes such a psychological crutch that they feel an inability to express themselves in meaningful language, so they punctuate it with shock-ing profanity and vulgarity. They continue to feel socially insecure with their peers who use blustering speech so that, without that bold speech, they are afraid of being disdained as a nerd. And after long practice, some lose all sense of the dis-tasteful nature of their contemptuous and irreverent language. What is classified as vulgarity may differ in different generations and cultures. To ask that question is almost to answer it.