This is The Right Way to Hang Toilet Paper, According to Science

Everyone thinks they know the right way to hang a roll of toilet paper. But now we have a official, scientific answer as to what is right: Inc. reports that a recent study conducted at the University of Colorado, the “right” way to over because with that method you’ll only touch the toilet paper you’re personally using. The right way to hang your toilet paper is with the end going over the top. If you hang toilet paper using the under method, then there’s a good chance your hand will brush the wall, leaving your bacteria or picking up someone elses. With the over method, you can easily avoid the wall and get the paper you need.