This is how SH and I fight:
SH: I am telling you to do something completely obvious
Me: Only an idiot would not know that. Do you think I am stupid?
SH: But you don't always do it my way.
Me: Your way is not the only way. Shut. Up.
SH: But you are not doing it right.
Me: You need to shut up and you need to change.
SH: No. You need to change.
Me: No! You need to change!
SH: No! YOU NEED TO CHANGE!
Me: NO! YOU NEED TO CHANGE!