If your wife asks why you did something, and you respond... because I wanted to... is that STFU? If she keeps asking well why or how come... and you respond I don't have to justify what I wanna do... its what I wanna do. Is that still STFU?

EDIT: Rereading WISNIFG... pretty apparent I went full retard on understanding it the first time around. Thanks for the kick in the ass guys.