I want to sit naked on the couch
Oh really? Why do you want to be naked on the couch?
Because I am trying to make my girlfriend angry.
You are trying to upset your girlfriend on purpose by doing something that you know will bother her. You should be more sensitive to others and their wishes.
I'm going to sit on the couch naked no matter what my girlfriend thinks.
If you try to intentionally make your girlfriend angry she may end up leaving you. You should just sit on the couch clothed.