easier to pull and tear when the paper is hanging towards the user. If it hangs against the wall, the friction makes it harder to get a clean tear.
So, there you have it! History, science, and the inventor himself all agree: Option 2 (Over) is the officially correct way to hang toilet paper.
A Fun Takeaway for Your Next Bathroom Visit
At the end of the day, whether you are Team Under or Team Over, the most important thing is that there is toilet paper on the roll when