Personal Body Image Index (PBII) - replacing BMI?

The general idea is as follows: Start with your weight. Subtract seven pounds if you have just worked out. Add five if you've single-handedly finished a plate of guacamole and chips; four for macaroni and cheese; six for death-by-chocolate cake. Subtract ten if people nearby are fatter than you. If you're wearing black pants, subtract two; if in a bathing suit, add eight. If you are more than seven years older than the group average or are surrounded by bikini-clad undergraduates with toned stomachs and cellulite-free thighs, add 20.