According to Cottonelle:
It’s the OG of TP
Here’s one for all the history buffs out there. Seth Wheeler’s 1891 patent shows the original placement of the toilet paper roll using an “over” approach.- 70%1 of wipers already prefer this position
Not that you should ever blindly follow the crowd, but a whopping 70% of the population prefers the “over” position. - Makes it easier to grab
Because the toilet paper is already closer towards you, it makes it easier to grab from a seated position. - Less contact with bathroom surfaces
When the toilet paper is hung “under”, your knuckles could rub against the wall as you tearoff a sheet. This action may transmit germs onto the wall or other bathroom surfaces2 - Makes it easier to tear
Facing the paper away from the wall generally makes it easier to tear.
Looks “tidier”
The first supporting point for the “under” technique is that it offers a cleaner look. With the toilet paper closer to the wall and the paper hanging behind the roll, it does make for a more minimalist visual.- Limits accidental unrolling
If you have a pet at home who is prone to playing with the toilet paper, then you might want to give the “under” technique a try. Because the roll hangs against the wall, there’s enough tension to keep the roll secure in its place. - Increased difficulty in unrolling leads to lower/more economical usage
Sometimes it just takes less accessibility to make us realize the consequences of our actions. This goes for wiping, too. Because the “under” method is a little bit more difficult to unroll, users are less likely to use excessive amounts3 of toilet paper when using the toilet.
I am with the majority on this one; however, when I sometimes drop a full roll into the toilet bowl – neither way really works.