As the sheets go from 3 to 2 layers you have to use more. Also, recycled paper is heavier due to fillers etc in it.
Newspapers are getting too expensive to use.
The sales of bidets have dropped.
Laxative sales have increased in tune with toilet paper sales.
People use the toilets more since the market collapse, it has given all of them the "you know what"
Pick any of those or add your own theories.
:)
