A pistol-type spray nozzle includes a handle, a water guiding inner tube, a first water control valve, a second water control valve, a link rod, a control lever, and a thumbknob. Resources necessary for delivering the predicted video and audio stream, in addition to resources necessary for the video and audio stream that is being received by the terminal or that has been selected for reception by the terminal, are secured in advance before a user of the terminal selects the next video and audio stream. Also provided is a method for screening an odorant for its capacity to increase or decrease vaginal blood flow, and an article of manufacture, or kit, containing an odorant and instructions for its use in altering vaginal blood flow. The drive mechanism includes a threaded spindle which, in order to provide for a particularly stable and long-lasting construction of the drive mechanism, is movable solely translationally and is coupled with a transmission mechanism operating the at least one raising and lowering mechanism.