I think what really grabbed people’s attention is that he kept refusing to explain why he wanted to do that.
Whatever his reason was, it was such a stupid thing to be memeing about that I felt at home here right away. Edit: this was a while back now, during the first big migration from reddit after the API change protests.
It was more the lack of an explanation that hooked people, rather than just the not pooping - IIRC, we never ended up getting any real explanation for why this guy needed to not poop for a week.
It was honestly pretty great, people came up with everything from “he’s smuggling himself internationally in a shipping container” to “he’s determined to be the winner in a really weird Mr Beast video” to “he’s giving up on society to live with the sloths” before it started to turn into kind of a circle-jerk.
And of course, suggestions for stopping the poop included butt plugs, eating only cheese, butt plugs, a liquid diet, and more butt plugs.
Didn’t it turn out he was making a pilgrimage to Mecca and didn’t want to use public bathrooms or some such?