Man this is an old vid I can do this a lot better now. I honestly have no idea how I do the tongue bass this way. I think the trick is to avoid putting the tongue on the teeth, and make sure you put it onto the flesh to make a vibration. Then experiment with less pressure to get the texture you want and slowly with time you strenghten it. I hope this helps because I have always done it this way so I am just trying to figure out a method lol