Many couples have debated, argued and perhaps even fought over issues in the crapper, the loo, the W.C., the bathroom, etc. Seat up, seat down. Toilet paper overhang. Toilet paper underhang.
Maybe we can address the seat issue at a later time but for right now, let’s look at the proper way to position a new roll of t.p. based on physics. She (or he) won’t have a leg to stand on after reading this scientific explanation, all shown with easy to understand diagrams.