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A man calls his mother in Florida. "Mom, how are you?"

"Not too good,"says the mother. "I've been very weak."

The son says, "Why are you so weak?"

She says, "Because I haven't eaten in 38 days."

The man says, "That's terrible. Why haven't you eaten in 38 days?

The mother answers, "Because I didn't want my mouth to be filled with food if you should call."