Baking Contest

Last night, well, an hour ago, I dreamed that I was buttering a slice of fresh baked bread to submit in a baking contest. I turned around to cut one more slice to add, and Jane took a big bite out of the first one. "What're you doing?"
She laughed.
"It's not funny."
"Oh no," she teased, "The whole morning is ruined!"
"I have to submit that," I whined.
"So, I only took a bite."
"You have chicken pox." She did.
"Oh. Well, big deal. Relax."

WHAT THE HELL DOES THAT MEAN?