Speaking of BMI, I had a really good idea for a new gadget that Apple should make.
The iBM. After a steamy grunt session on your throne, simply point the iBM at your leavings and be provided with a full breakdown of which meal has now passed on to the other side. Stuck in a quandary over whether this latest bio-pile is your lunchtime BLT or mid-afternoon danish break? Let the iBM solve this poopescent problem. No longer must you suffer thoughtless, anonymous flushes, never knowing the true nature of your excrement. The iBM puts the power -- and presence -- of your crap where it belongs: in your hands.
Plus the name is quite easy to remember.