So a wife buys her husband a scale to help him with his new year's resolution: to go on a diet. A week later the husband says, "Honey, this here scale is great! Now not only can I weigh myself, but now I know how much I'm shitting out on my new diet!" The 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 husband says, "... yeah, I guess I could do it that way..."