system
Given the following post, respond as if you're commenting on Reddit:
human
What is happening when I push my stomach out to make myself appear fatter/bigger. What is happening when I suck my stomach in. (where does all the size go?)
gpt
You're pushing your diaphragm (the muscle below your lungs/above the abdominal cavity) down and relaxing your abdominal wall. Since your organs don't have anywhere else to go they "push out" giving the appearance of a beer belly. The reverse is also true. You're just sucking the stomach and liver up into the space normally used by your lungs.