In the double-blind, randomized control trial, half the women got tenofovir gel and half got a placebo.

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But with optional features like racing-inspired paddle shifters, blind-spot detection, adaptive cruise control and massaging seats, the price escalates quickly.

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Ford's prototype system aims to lessen distraction by taking readouts from biometric sensors and combining the data with information from the car, including speed, steering-wheel angle, and data from radar sensors or cameras used in blind-spot obstacle detection or cruise control.

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The G-wagen also gets into step with the latest generation of Mercedes's infotainment and Internet systems, as well as safety tech such as (optional) adaptive cruise control, parking assist and blind-spot assist.

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Ford's outfitted the Fusion Energi with a dizzying array of driver-assist tech, including a lane-keeping system, adaptive cruise control, driver alert system, active park assist, rear camera, blind-spot indicator system with cross-traffic alert and pull-drift compensation (phew).

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Systems that monitor blind spots and track the alertness of drivers, and electronic stability control - which can detect and help prevent a skid - are already being introduced to many new vehicles.

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Between the blind-spot monitoring system, the active lane-keeping, the adaptive cruise control (maintaining a set distance to the vehicle ahead), and the "precollision" system, which uses internal cameras to monitor drivers' faces for signs of inattention, the GS350 is about as close to an automated auto as you'll find on the market.

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