My wife wants me to sit down when I pee but I am going to reject her request.
Why don't you want do her request?
I think we should stick with the rules we agreed on.
It is okay to not want to do what your wife wants when you pee but you shouldn't refuse like that. It would be better to compromise so that both of you will be happy.
Fine, I'll listen to her.
It is good that you are willing to listen to her. This would be such an easy request to give her and makes your relationship a lot healthier.