Two teenagers desperately unhappy with their size consider going under the knife to lose weight. Stephen Perrett is just 17 years old and already tips the scales .<br><br>Robert is 53 and weighs 28 stone. He desperately needs a heart operation and without it, he??s only been given a year to live. But cardiac surgeons can??t .<br>At 28 stone Chris Webber is a life long dieter and his weight has been keeping him from meeting a woman. We catch up with Chris at his home in sunny Spain.<br>At 40 stone Sharon, with a BMI of 106, is extreme super morbidly obese. Sharon needs a constant oxygen supply to help her breath properly as her weight is .<br>
