Do SJs ever have reasons? Cause I heard "because I said so" quite often growing up.
That's what we say when there really is no reason (or none that will satisfy you), but you'd better do it our way or it will rumple our perfect plan of how things should be.
Seriously, I hear it come out of my mouth sometimes and it sounds ridiculous, but it's a useful trump card at times when to entertain more debate/discussion would give the illusion of choice when there really is none. Tough noogies, kid.