A lot of household arguments are about to be settled.

The world owes a debt of gratitude to engineer and tech writer Owen Williams. He uncovered Seth Wheeler's original 1891 patent application for perforated toilet paper, tweeted it, and in so doing, finally settled the disagreement on how it is supposed to hang. Toilet paper drum roll, please…

There you have it. Overhand it is. As though there was ever any doubt. Underhand makes no sense. You really want to reach beneath the roll to grab the paper right before you reach beneath yourself? That's too much arm extension; you're liable to sprain something. Overhand just works better in every way. If you need more proof, here's another image from Google's patent database:

Sources: Owen Williams | The Mirror | Google