The need to urinate at night increases in direct relation to the hour past midnight, layers of clothing worn, occupants in your tent, and inches of rain since sunset. Curiously, it increases in ‘inverse’ relation to the outside temperature.
The ground under shoulders compresses without sunlight while the ground under feet expands.
Rocks and sticks rise above dirt when irritated by tent flooring fabric.
Feet expand when removed from hiking boots. The same law applies to tents and tent bags, clothing and backpacks, and sleeping bags and stuff sacks.
Backpack strap widths decrease with the distance hiked. To compensate, the weight of the backpack increases.
