Installing toilet paper rolls with the loose flap "over-the-top" is superior to "underneath".

My proposition is under the realm of "MAXIMUM EFFICIENCY" with respect to a lifetime of energy usage. I submit that, when installing new toilet paper rolls on the dispenser, it is wiser to install them so that the loose end of the roll (the thing you tug on) is coming over the TOP/FRONT of the roll rather than hanging BEHIND/UNDER the roll. I understand that this is a matter of preference, but my interest is in preserving ultimate efficiency. If the process of wiping one's bottom uses additional steps, further energy is necessary and thus less efficient than a process with fewer steps. Typically, when the toilet roll is oriented so that the loose end is behind/underneath, the end will always be hanging. This is true even if one uses their hand to spin the toilet roll towards them, thereby rotating the loose end up over the back of the roll to the top. After a certain point on its circumference, the weight of the paper will cause the loose end to once again fall downward to a hanging position once again. I find this position significantly frustrating and annoying, inasmuch because it risks the loose end contacting a dirty ground, as because it adds the additional step of having to reach underneath the roll and search for the loose end. The peculiar position of installed toilet roll dispensers in public bathrooms, relative to your sitting position on the toilet, makes this latter point more relevant. Given the construction of those bulky dispensers, and the inability to reach inside of them, it's incumbent on the janitors to install the toilet rolls with loose end hanging, to facilitate the toilet user's access to it. But this common practice has been carried over to the household bathroom, where it is clearly not needed, as toilet rolls are not enclosed in large plastic-covered dispensers but free and open. Since minor budges of the toilet roll (from inadvertent contact with the roll, or carryover rotation from pulling on the flap) will always rotate the roll away from the user, the underneath-hanging flap has a tendency to drop lower and lower to the ground. With the flap over the top, the loose end can NEVER hang below the length of one sheet, since the perforation of the last sheet is attached to the rest of the roll. The only way the spool of toilet paper could be unraveled in such a position is for the roll to be rotated TOWARDS the user, and the only time a roll is rotated towards the user is when he/she is dispensing toilet paper with a careful hand. Even though such minor differences net little change in efficiency in one crapage visit, I propose that a lifetime of pooping necessarily compiles thousands of minutes of orienting a toilet roll for proper dispensing. LOOSE FLAP HANGING UNDERNEATH: places the flap slightly further away from the user, and in a more awkward position. When using the two-hand method for dispensing toilet paper (one hand steadies the roll while the other tears the required amount of sheets), the steadying hand slightly blocks the view of the other hand having to reach underneath to access the hanging sheets. LOOSE FLAP HANGING OVER THE TOP: presents the loose flap directly towards the user, in the most natural position for dispensation. With the two-hand method, the hand tearing the sheets is now unfettered and in no way interfered with the steadying hand, and needs not reach an awkward length to tear sheets. One final point: there IS an occasion where hanging loose ends (orientation: underneath) WOULD be more efficient to the user, and that is when the toilet roll dispenser is positioned ABOVE the head of the user. This shows up from time to time in Europe. In such a situation, the hanging flap has an advantage since it places the loose end at the most accessible and most efficient position for the user. An over-the-top position in such case would be inconvenient. However, this debate should focus solely on standard american dispensers, positioned at or below the waist-knee level of the user while sitting. I look forward to the debate. Cheers, Peter Z.