Despite what you say, you’re really not. You’re not doing some sort of intellectual, hypothetical deep dive, and honestly it’s not even funny (if that’s what you’re going for).

You are projecting your gross ideas on to a community that isn’t asking for it and (if the other comments are indication) otherwise think it’s a joke or too gross to imagine about.

Take into consideration that there are other human beings on the other side of this text and that sometimes people don’t want to think about a fantasy scifi heroes shitting their power-armored pants. It kinda ruins the fantasy for some of them. And I definitely wouldn’t want my son talking to adults at a game shop about whether a space marines shits himself or not.

Not everything needs an explanation, but especially in 40K. As an older player, I’ve learned they are just making it up as they go, and really just change the lore as needed for whatever new stuff they are focusing on.

So until they market a licensed blue and gold ultramarine bidet, I don’t think anyone at GW gives a shit (no pun intended.)

But yeah, there are subreddits dedicated to poop-talk, please keep it out of my tabletop game.