Just as electrical stimlation helps atrophied muscles regain their strength and flexiblity...

You take a 9-volt battery, hold it just-so and dab at it with your tounge - repeatedly

I guarentee, that it will, well, uhh, uhhmmm, do absolutely nothing for you. But, I'll get a big kick listening to you tell a story about the experiment.

Besides, the tounge is best used outside of confines. Think about it, we only really take it out to play for, well, play time! Most of its life is spent running away from teeth and in my case - getting all twisted when I'm in the presence of a beautiful woman. So, my friend - let it roam, let it find those wonderful areas of a woman's body, yes, let it think (roam) outside the box.