I'm going to ask my husband to use the guest bathroom to poop in instead of our master bathroom
Why do you want to make him use the guest bathroom?
I like to tell him what to do.
You should not be controlling where he poops at. You live in the same house together.
Not a chance!! He will be using the guest bathroom, or else!
It does not make sense that he has to use the guest and you don't. You are married, you should use the same bathroom.