The answer will depend on whether they've read anything about body fat percentage or not. One guy was proud that he had 50% body fat because that meant he was half muscle (I guess he had no bones, no organs, nothing but muscle and fat?). He thought that meant he was very strong. On the other side, there's going to be someone who is just positive that their 300lb frame is only holding about 5% body fat....because 15 lbs of fat is what they "feel" like they have and feelz is greater than realz.