system
Given the following post, respond as if you're commenting on Reddit:
human
Any good mixologist knows that adding booze to carbonated liquid kills the carbonation, but reversing the order and adding the fizzy drink to the booze retains some of the fizz.  Why do two different results happen when mixing the same liquids in the same ratios?
gpt
You lose a lot of the carbonation in the initial soda pour due to microscopic nucleation points on the bottom of the glass--and the ice you're pouring over. By adding the liquor first, these surfaces are getting filled (or smoothed off). You're "wetting" the glass, so to speak. 

There's nothing special about alcohol in this regard. You can get the same results with juice.