the part of the
headphone that plugs into the output of some type of
audio device, be it your
stereo,
portable cd player,
sound card, etc.
they often get these annoying, little "kinks" in them causing that part of the wire to roll/twist up .. this drives me quite fscking insane .. to rectify this situation I usually take the headphone wire, stretch it out fully and then slide it back on forth on a thin, hard .. "something" .. I use the top, back part of my computer chair .. this does a good job at removing the kinks and allows for insanity-free audio enjoyment.