Fatties usually shit on BMI, but they shit on BMI for the wrong reasons. 19-25 for normal weight is pretty silly because I would consider many women in the upper end of that range to be fat. Only exception is women who lift heavy, but even then men generally have denser muscles. Men on the other hand should generally aim for a BMI of 25+ while staying lean so they don't get the skellington look. People constantly called me super-skinny when I was still BMI 21. That's mid "normal" BMI but it just doesn't look  good on a tall male frame.