however it happens to be when i put the roll on, i never think about this and have no idea why anyone would
I'd bet under = less used.I was going to lock this thread as a necro, but thought I'd add to the thread instead:
About 10 years ago, they actually did a study of toilet paper usage. There was an article in a restaurant industry publication about which way resulted in customers using less toilet paper. For the life of me, I can't remember which way it was. But, the "right" way to put it on was so that customers didn't pull off quite as much.
So many people are anal on this.
I just put it whichever way it lands when stick the center spring through.