Blue Whiskers

"Doc, I've been finding blue whiskers in my mouth."

"What?"

"In my mouth. Blue whiskers.  I'm not sure what they are.  What does that mean?"

"I have no idea what you're talking about.  Blue-colored hairs? Growing out of where?"

"My mouth. Bright blue."

"How long are they?"

"Not too long.  They almost don't even feel like hair.  They're thick, almost like plastic."

"When have you been noticing them?"

"Usually when I brush my teeth."

 "What color are your toothbrush bristles?"

(big pause)

"Ohhhhhhhhhhhhhhhhh!"