system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: why do some of us do certain actions (snapping, winking, hand gestures, etc...) better with one side of our body than the other?
gpt
TDLR: One side of the brain works harder than the other.

The right side of your brain controls the left side of your body, the left side of your brain controls the right side of your body, so one side our brain is just working harder than the other causing dominance on one side.
E.g. if your right handed, footed e.t.c. the left side of your brain is working harder.
Sometimes, both sides of the brain work in sync, so you don't have a dominant side.