system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How do the scissors know which hand I’m using, and why do they care?
gpt
When you close your hand naturally with a pair of scissors, your hand is pushing the ends of the two blades together because of the position of the pivot point. If you have the scissors in the wrong hand, then your are pushing the blades apart naturally. That is why right handed scissors do not work well in the left hand and vise versa.

If you compare left handed scissors to right handed scissors, you will see the two blades are on opposite sides of the pivot point for each pair.