I am wanting a little help with prostate massage.

1. Which prostate sex toy should I buy?
   
2. What is the correct technique when massaging the prostate?
   

I bought a Picobong Tano vibrator but feel it is not really fit for prostate massaging purpose due to the fact you simply switch it on and insert like a place and stays in place and feel I need something that you can use to massage by movement as well as vibrating, so could you answer the following questions to help me find the perfect prostate play mate.

Thank you for your help.