Being punched is somewhat respectable. Everyone has been punched before. Not everyone has been thrown in a garbage can though. I mean the level of disrespect.
Being punched and going back to your abuser (without attempting a Kill Bill-style revenge) <<<
The difference between Gaga and Rihanna is that the latter was ACTUALLY punched. Like, battered. She literally looked SCORCHED after Chris Brown wrapped his big hands around her neck and bashed her against the car door, then the concrete, then drove away as she sulked next to a McDonald's drive thru.