So the next time you get cut off in traffic, or your date goes awry, or the Walmart doofus posing as an employee ticks you off, STOP! Don't mutter under your breath! Don't release the obscene gesture or let loose the torrent of curse words!
http://www.tintinologist.org/guides/lists/curses.html And THEN release the torrent of new and IMPROVED words! (The obscene gesture usage is still up to you, actually).