no more wondering whether somebody's turned on
From the site, "Jabberjockeys consist of a pair of underwear (one male, one female) which discreetly inform a partner when the other gets aroused. By sensing subtle changes in temperature, moisture and pressure the undergarments detect arousal. The underwear automatically notifies the partner by activating vibrating motors sewn into the fabric of their underwear, thus enabling them to discreetly share their heightened emotions."