My neighbour has a squeaky toilet roll dispenser in their bathroom, which I can hear through my bedroom wall. Thanks to this, I'm convinced I can sell my knowle

My neighbour has a squeaky toilet roll dispenser in their bathroom, which I can hear through my bedroom wall. Thanks to this, I'm convinced I can sell my knowledge of poop-frequency to someone. A hardware store? Insurance company? I don't know, but there is profit to be made here.