Potty training, as mentioned here before, is on our minds at Casa del T-bone. Because it's not on yours, however, I will not rehash the proceedings here. Instead, I'll focus on one aspect that affects us all: toilet-flushing volume (as in, noise).
I don't know about yours, but my life has been marked with a successive number of ever-louder potties. My first experience was with a big beige porcelain jobby that would shake when the handle was moved. When my family moved to Texas, we gained a third bathroom that only got used when we had guests or in emergencies. If the shower next to it went un-unsed for a period of time, the air in the pipes would make it sound like a motorcycle was coming at you through the drain.
With our house here, gravity has taken its toll on our now 42-year-old abode. That means the typical "gravity toilet" (you flush it and the force of gravity on the water jettisons your pee and poo) just didn't cut it anymore. Enter the American Standard "Champion" toilet, which pressurizes the water in the tank to make haste with your waste (and it talks a big game, too). Even that wasn't enough to overcome our stalagtite pipes, though. Drumroll please ... enter the power-assisted potty. Not only does it flush, but it lets the neighbors know about it.
Toilet noise, at least in my mind, is measured not in decibels, but deci-bowls. Our current toilet would be off the decibowl scale. But we can live with noise if we don't have to live with, well, you know. The problem is you can wake sleeping toddlers (or spouses) (or extended family in another state) if you flush it in the middle of the night, so you have the whole "lettin' it mellow/flush it down" delimma on another level.
So this is just one, but an important aspect of all our lives. Without indoor plumbing, we'd be no better than bears with furniture.