Todd,

The reason men don't flush a urinal is because we know that the ladies won't be going in after us and bitching. Thanks for taking that away from me.

-Tim

Self flushing toilets and urinals are great, but if you don't get quality plumbers to install them or they have crappy sensors, then your bathrooms end up stinking bad.
I personally have bigger issues with people who urinate in a toilet stall without lifting the lid and pissing all over the seat.