These words are usually used to insult someone, to be rude, to express our angriness facing some stupid people or situations. « Stop being a dck ! You cnt ! » But why ?
Initially, they’re just words to name female and male genitals. Some would say that they're the most important things in life : the origin of Life... or pleasure !
Both equal, both independant, both enjoyable !
Do you agree, d*ckhead ?