Vibrator?

How can I get some kind of powerful vibrator? I talked to my mom and already got a bullet but it's out of batteries, not water proof (baths turn me on) and barely has any power. I've considered talking to my mom again but she already got me one and I think that would be a little weird for the second time. I have no sister I can talk to and I have some other friends but they are in the same boat :/