The Perils of Plumbing

I realize that this is a somewhat distasteful subject, but it’s been bugging me for quite awhile now. I’m talking about those electronic eye flushing devices on more and more public toilets. Sure, I understand the idea behind them:  make sure everyone flushes when done, and save lots of water while doing it.  But tell me how on earth the doggone thing saves water when it’s triggered by every other breath! It seems as if I always happen across the super-sensitive seats, and I can assure you t