It's taken a decade to discern this trend, but my children never get the stomach bug during the day. No, in our household, vomiting episodes are always cloaked in the darkness of night. This might be a blessing in disguise, of course. (Who actually wants to be fully cognizant when scrubbing throw-up off your hallway carpet because your child didn't make it to the bathroom in time before exploding?)
Besides, once you've comforted the child, cleaned the mess, scrubbed yourself with Lysol, danced a little heeby-jeeby dance as you contemplate the billions of germs likely still teeming through your house, taken a quick shower because you know you're now teeming with germs, and laid back down to bed, you're free to confess your deepest fears aloud into the black void:
Nothing in this house will ever be clean again. Never. I think we need to burn it down.
And your spouse will grunt in agreement, because, quite frankly, at 2:00 in the morning, burning down your own house seems a perfectly logical response to vomit.