Eric Demay

For some reason, Mexicans don’t spit their flavorless chewed-out gum on to the sidewalk, they diligently place it at eye level on the trunk of certain trees.

Now the real question are:

• What determines a good gum tree: its placement? Shape? Size? Bark type?
• And is the amount of chewed gums already stuck on the tree trunk a influential factor of gum collection growth (i.e. the more gums on the trunk, the more gum chewers will be enticed to place their gum on said trunk)?