Everyone should have SOME sort of a scale like this Nokia Body Cardio scale. A scale which lets you see those composition numbers. It's critically important for a person not just to know their overall body weight but also the percentage of fat, muscle, and water they are. A person who is 160 pounds and mostly muscle is quite different, health-wise, from someone who is 160 pounds and mostly fat. It's important to know that difference. A scale like this sends a mild electrical signal up through your bare feet and can tell your composition based on the way the signals return to the source. The science is well proven.
Do you have a scale like this?
Nokia Body Composition Cardio Scale Full Review