"Wooden chairs, how... primitive."
The alien looked at the human, detecting some kind of disappointment.
"Wood is very natural and easily compostable," she explained.
The human nodded, "I suppose it has some interesting properties - insect, mold and weather-proof?"
"Oh yes!"
"Why are they all slightly different - carved that way?"
"Carved? No, we pluck them from the Chair Tree - it takes a while for the chair-fruit to grow consistently."