A wife buys her redneck husband a scale to help him with his new diet.
A week later the redneck says, "Honey, this here scale is great! Now not only can I weigh myself, but now I know how much I'm shitting out 'cause of my new diet!"
His wife says, "That's great; I never thought of that. So you step on the scale before you go to the toilet, step on the scale again when you're done and the difference is the weight of your poop?"
And the redneck says, "... yeah, I guess I could do it that way..."