He comes home from work and his wife is at the kit

He comes home from work and his wife is at the kitchen table, crying her eyes out. "What's the matter, honey, what's happened?"
Through her tears she sobs, "I saw the doctor today...he told me I'm gonna die...he said I have tuberculosis," and goes on crying.
"Wait," he says, "that's crazy. You're healthy as an ox, you haven't been exposed to TB, nothing in your daily life could give you tuberculosis.
"But the doctor said I'm gonna die!" she pleads.
""I'll check this out," he says, and goes to the the other room to phone the doctor's office."
After a few minutes, he comes back to his disconsolate wife, chuckling and giggling.

"How can you laugh at a time like this," she weeps,"...I've got tuberculosis...I'm dying, the doctor said."
"No, Sadie, you misunderstood," he explained. The doctor said, "You've got to diet! You've got too big a tuchus!"