I have purchased a few packaged vibrators in the past. Since the store holds a no-return policy, these vibrators are opened at the register, batteries are inserted, and the cashier makes sure that the device is working. If I were to take this vibrator (that the cashier had previously touched briefly to make sure it was working) and go home and use it and insert it inside me, do I have any risk of contracting an STD? I know that I am overly paranoid and worried- was just wondering. ANY help you could give me would be very much appreciated. Thank you.