system
Given the following post, respond as if you're commenting on Reddit:
human
Why don't I get an infection when I shit so hard that I bleed? Serious question.
gpt
Your body has natural protection against bacteria called White Blood Cells, these help protect your body from harmful buildup of bacteria in the body. The veins and arteries in your rectum are small, not like the large ones in your gut or in your legs/arms. This means it is not an open freeway so much as a dirt road that the bacteria must travel through. This helps the White Blood Cells target and destroy that bacteria before it becomes too harmful. Lastly, recently expelled feces does not have as many harmful bacteria as feces that has been out in the open for long periods, this reduces the chance of infection.