system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do men start accumulating more stomach fat at around the same age range?
gpt
Generally, as people get older they become less active and eat the same amount of calories or more and therefore gain weight. Men tend to gain more weight around the stomach than other areas as opposed to women who tend to put on more weight on their legs etc.

While, there is some decrease in metabolism with age, its fairly small. The main culprit is lack of activity compared to youth.