Let's just say that you are in the bathroom and you change the toilet paper roll.
Let's further say that when you toss the empty cardboard tube into the trash can you happen to miss [you are amazing, but not infallible].
Let's continue to say that you are in a rush and you neglect to pick up the empty tube and think, "O.k., no big deal, I'll just grab it later."
Let's meander along as days go by and you keep forgetting to pick up that empty tube, but you see it when you use the bathroom, and you hit a point where you are wondering if it's a figment of your imagination and if you are the only one who can see it because there are 2 other people who use this bathroom [granted, not with your frequency - thanks, mother-bladder!] and neither of them has bothered to pick it up, so maybe it doesn't actually exist, perhaps it is a hologram like Will.i.am on CNN during the election [please explain this to me - no, don't, I don't care].
Because otherwise it means that you, as the mom, are responsible for picking up everything ever ever ever and even though you pick up stuff after the husband and the girl and the cats, no one, not even the cats, will pick up after you.
And THAT'S why being the mom sucks.