Actual tongue... ??
What Harris (cigrmaster) said. I might add to stick to one packing method that seems to work better than others for you, even if it's the Frank Method. I think the mouth's muscles and other anatomical structures adapt by themselves to the new thing. Kinda like muscle memory. If you stay consistent with your packing and lighting, the mouth will 'find a way' by itself to draw from the pipe with the right, non-tongue-scorching strength. OTOH, if you're always changing things, the mouth will have a harder and longer time settling in.
At least, that's what I've found in and through my own experience. I've noticed that my drawing is no longer as conscious as it was when I started out. It just comes automatically.