If you are watching your caloric intake but want to indulge in
an "informed" guilty pleasure, I have the perfect chocolate for
you. "Rompicollo" by L'Agenzia per il Disegno e la Funzione is a
tablet of chocolate whose portions come printed with calorie
counts carved directly on the surface. The chocolate bar is
divided into portions of different sizes with different calorie
count.  This allows you to treat yourself to a bit of chocolate
while keeping you aware. That way you'll be able to monitor how
long you'll have to hit the treadmill for to make up for those
excess calories.