I think I have an invention to make alot of money. 12Volt Vibrator?

Vibrators all run on batteries so I thought I would design one that could run on 12volt. That way you could plug it into your cigarette lighter and use it any time you are in the car. Just think, one your way to work or on the way coming home or when you are on a cross country trip. What do you think ladies? Would you buy such a product?