Ten or fifteen years ago Oprah (formerly of Baltimore) did an entire program on the subject. Can't remember the expert opinions.
https://en.wikipedia.org/wiki/Toilet_paper_orientation
In November 1986, Landers told the
Canadian Commercial Travellers Association that "Fine-quality toilet paper has designs that are right side up" in the
over position.
[66] In 1996, she explained the issue on
The Oprah Winfrey Show, where 68 percent of the
studio audience favored
over;
Oprah suggested that
under uses more paper.
[67] In 1998, she wrote that the issue "seems destined to go on forever", insisting, "In spite of the fact that an overwhelming number of people prefer the roll hung so that the paper comes over the top, I still prefer to have the paper hanging close to the wall."
[61] On the day of her last column in 2002, Landers wrote, "P.S. The toilet paper hangs over the top."
[68] Her published commentary on the issue has even continued after her death. 2005 saw the premiere of a one-woman play written by
David Rambo: a character study of Ann Landers titled
The Lady with All the Answers. Toilet paper comes up once again, and the actress surveys the audience for their opinions.
[69]