When the women are near an individual, the headbands worn by the men glow brightly. However, when they are not near, the glow diminishes. Spock postulated that the headbands may be polarized conductors which transfer the vital energy or life forces from humanoid males to the bodies of the women. Prior to receiving this life energy, the women appear listless. However, the workings of the headbands cause males to undergo rapid aging and weakness, which in turn makes the women more energetic and vital. The aging process caused by these headbands causes men to age at a rate of ten years per day.
In 2269, the crew of the USS Enterprise visited the Taurean system in an attempt to solve a mystery concerning lost crews and ships. The male crew members, including Kirk, Spock, McCoy and Carver, almost succumbed to the life-draining devices, but were saved by the female officers, led by Uhura and Christine Chapel. (TAS: "The Lorelei Signal")