Some words, like n****r, ch*nk, and c*nt, are so forbidden that we won't even spell them out here. Decent people simply don't use these words to refer to others; they are intrinsically disrespectful. But aren't words just strings of sounds or letters? Words have life because they express ideas. But in a free society, how can we prohibit the expression of ideas? How can we forbid words? Where does the strange power of curses, epithets, and scatological terms come from?