Stacking boxes is the female alternative to crossing swords; when two girls who are friends have smashed the same dude.
This is generally looked down upon for preserving a friendship. Girlfriends should never stack boxes.
"You should smash that fine dude!" - L
"No way! You did, I don't want to be stacking boxes with you" -A
Threesome with one guy & 2 women
It usually takes about 4 shots each to get women to box stack
"No matter how storage-containers are arranged in a stack, the one you want will always be on the bottom, and so you'll have to move all of the others first."
Regardless of whether you arrange a stack of boxes in alphabetical/numerical order from top to bottom or bottom to top, Murphy's Law of stacked boxes will always "get you" --- i.e., da box you'll need will always be ether da first or last one, depending on which way you stacked them, and so you'll always need to take them all down to get to da one you need.