Pee=Energy. Average bladder holds 500ml of urine 500ml=500g. E=mc^2 E=(500g)c^2. c=299792458 m/s. c^2= 8.98755179 × 10^16 m^2 / s^2. E=(500g)(8.98755179 × 10^16 m^2 / s^2). E= 44937758936840882 J = 11950286807000 kilocalories = 5975143403 day just living off drinking one of your pisses.