Vibrating Toothbrush

Omg am I the luckiest person on Earth or what? My mum just went shopping and I told her to buy me a new toothbrush. Well, she came home with one that is electric but it's bristles don't move, the whole thing just vibrates and the handle is the perfect size and shape and everything! As soon as I saw it I got wet and I had 2 try really hard to just act as if, 'oh cool, new toothbrush'. She's going to work in a minute, can't wait! Whoever invented this toothbrush had women in mind. I mean, why else would you invent a toothbrush that does nothing except vibrate?