Nasty stuff, mayonnaise. We used to use it to culture disgusting pathogens. Stuff'll kill you. And to think they named a clinic after it!
We had this sort of controversy last time we debated whether toilet paper should come off the back side of the roll or the front side as God intended.
Lots of distasteful jokes and pranks could not have been done, had it not been for mayonnaise. :-)
TP is rolled off the front. Back when it was printed with cute little flowers to match your bathroom decor, there was no question which direction it was to be rolled.
Rolling it off the back is nasty. Feces hands touch the wall.