There used to be this TV show on California Public Television called "Self" and it would present moral dilemmas to children and then STOP DEAD at the crucial moment of truth and you the viewer were supposed to think about what your action would have been and perhaps discuss the show with family and friends. SO here's one for ya:

You walk into the bathroom first thing in the morning to go potty. You pull your pajama pants down and come to find that you must have slept on a penny because it was stuck to your skin and COMES OFF, ROLLS DOWN YOUR BODY, AND FALLS INTO THE TOILET. In order to retrieve it, you must reach your hand, still sleep-warm and a little disconnected from your body, into the cold toilet water to get that coin. Or... do you leave it? Do you flush that coin?

There are some things to consider:
a) the toilet is reasonably clean, and there is no poop or pee in it.
b) the propensity for the swallowed penny to show up in poo is well-documented. It's like corn. So you could totally flush the toilet, and the likelihood that the coin would simply disappear into the sewers with no damage to the plumbing is very high.
c) this coin is not encased in poo.
d) the coin is worth one single cent. I didn't check the year that it was minted, but it couldn't have been that long ago. And I can report for certain that this was not a wheat penny.
e) no one will miss this coin.
f) this coin is heads side up, and bears the likeness of Abraham Lincoln, our nation's sixteenth, and arguably our greatest, president. He wrote, among many other things, the Gettysburg Address and the Emancipation Proclamation. He began his life in a log cabin in Illinois, and wrote his first lessons on the back of a shovel with a piece of coal. He rose from nothing to become a lawyer, and then to lead our fledgling nation through its worst national crisis, both freeing slaves from bondage and and saving the Union.
g) pennies are no longer made from pure copper. They are made of zinc with a thin copper plating overtop. The actual worth of a penny is much less than a penny.
h) Honest Abe Lincoln also suffered from melancholia.

Taking all these things into account, I will now stop the story and ask you what YOU would do in this situation?

Go ahead and discuss it with your family.