Ed, if you've had neck dissection it's probably because the nerve/muscles that control your lips were affected. I can't whistle at all anymore for some reason.

Bob

SCC Tongue, stage IV diagnosed Sept, 2002, 1st radical neck dissection left side in Sept, followed by RAD/Chemo. Discovered spread to right side nodes March 2003, second radical neck dissection April, followed by more RAD/Chemo.