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
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.