Task: Question Answering
Input (English): Context: so i have two best friends & they are both tiny & skinny & literally eat junk food every single day & never gain weight . they 're absolutely gorgeous btw , one with blonde hair & blue eyes , the other with olive skin & brown hair . & then there 's me . the fat , ugly one . 
Question: Why do n't the friends gain weight ?
Output (English): They do n't eat more calories than they burn .