system
A chat on subreddit /r/me_irl
human
How did you think your dad and brother made those stains?
gpt
Blood turns brown with it oxidizes/dries.

I'm talking mainly about blood that might splash back up toward the side of the bowl, which sometimes happens if a woman's period is heavy or the toilet being flushed causes something to fly toward the side of the bowl (also underneath the bowl lid).

I always thought it was dried splash back from my dad's or brother's massive shits/diarrhea.

Sometimes it was. But sometimes it obviously wasn't.