Epidemic Proportions

Recently overheard:

"Hey, do you want one of these brownies?"

"Oh, no thank you, I can't."

"You can't? Or you won't?"

"I can't."

"Why, what are you, diabetic?"

"No, I'm a fatabetic."

[blink, blink]

"Now, if you don't mind, please put those away out of respect for my serious medical affliction."