How do vetriliquist's avoid moving their lips when saying ';B';, ';P'; or ';M';?

I've always wondered how ventriliquist's avoid moving their lips when attempting difficult letter of the alphabet requiring lip movement. I know some hide behind the mic, and others do move their lips slightly. However, some of the better ones I've seen either don't move their lips or avoid detection.How do vetriliquist's avoid moving their lips when saying ';B';, ';P'; or ';M';?
You don't. the sound come's from the back of your througtHow do vetriliquist's avoid moving their lips when saying ';B';, ';P'; or ';M';?
I don't know that sounds hard!!!!!! Why do you want to know???
You have to move your lips when making bilabial two lips) or labiodental (lips and teeth) sounds. The trick is just that they do it very slightly. There's no way around it, though.
I only know that you replace the ';B'; with a ';D'; for example Boy is Doy.I hope this was of help.
They actually say D for B, T for P and N for M. The good ones have developed a skill with their tongues that will make one letter sound like the other.