A man called his mother in Florida. He asked, "Mother, how are you doing?"
She said, "Not too good. I've been very weak."
The son became concerned and asked, "Why are you so weak?"
"Because I haven't eaten in 38 days," she said.
"What?!?" he shouted, jumping to his feet. "How come you haven't eaten in 38 days?"
His mom replied, "Because I didn't want my mouth to be filled with food when you called."