Underweight and skinny girls - what's you're take on them Fph? In America, the UK and a few other countries the consensus seems to be that even if you're bmi 18.5, you're unhealthily thin and should gain. I personally find it puzzling as marathon runners, rhythmic gymnastic, ballerinas and quite a few guys from the military or working in physically strenuous jobs are often quite a few points below the ideal bmi. Their health is good and they have the energy to do something only a few people can. Let's not forget the that some of the sexiest women, like Miranda Kerr 2 and Erin Heatherherton 2 (pre weight gain) as underweight. Those girls are tan and glowing despite being under a lot of stress and doing shoots that sometimes last nearly a day. Could  a fatty do that? You know the answer, they'd need to sit down after 15 minutes. Anyone familiar with modeling knows that it takes a lot of stamina. Many hf models - who are even smaller - try bmi 16.5 or so, waist 22.5-23,hips below 34. And all this on a girl 5'9" plus, they manage just fine despite being a bit tired as is normal for a hectic lifestyle. That's why several skinny high fashion girls dont excersise, they get enough of it and for many girls, the more you work out the hungrier you get. It's a little different for the VS type girls,they get to be a bit heavier, work out to look fit and as a result of the constant calls and walks combined with moderate exercise they look healty and glowing.  Anyways, these are my first hand observations from the industry. What do you think FPH? Is being below bmi 18.5 dangerous, or do you side with the Asian and eastern euro countries that consider it athletic and good looking? Would you make an exception for girls like Kerr even if you think a low weight is ugly. If you're attracted to women, do you prefer the skinny, fit or the average body? If you're into men do you enjoy the skinny, fit or average look? Be specific - skinny and ft or more thick and fit or perhaps slim but soft looking? Lastly I'd like to point out the controversial health studies. It seems like reduced calorie intake is the key to health and longevity. Yes another study states that being underweight makes you as prone to death as being fat. Is it cause the sinny people were sick or ate horrible diets? Or is being underweight really dangerous? EDiT, the Okinawa island where many live up to a hundred years old. http://www.traveller.com.au/secrets-of-the-island-100-club-22yev they live in a warm climate, eat plants in many forms, have a protein rich diet (fish) and enjoy seaweed. The description of their lifestyle is relaxed. http://www.sciencedaily.com/releases/2007/11/071106164810.htm The association between weight and causes of death can vary considerably, with obesity associated with a significantly increased mortality from cardiovascular disease, underweight associated with increased mortality from primarily non-cancer, non-CVD causes, and overweight associated with increased mortality from diabetes and kidney disease combined, but with reduced mortality from other non-cancer non-CVD causes of death, according to a new study.