It all goes back to what Rihanna has seen in her own life and what she was taught while she was growing up. Perhaps in her family relationships or friend relationships, this occurred. So, that would lead her to think it was normal and acceptable. People who've been in or seen abusive relationships tend to think they're normal and acceptable. I know when I was that age I had heard the same experiences occurred with my peers / friends. Fortunately, my dad had always told me never to let a guy hit me or, perhaps I would have been like Rihanna. Looks like she was not steered in the right direction when she should have been. I can understand her father wanting to stand behind her, but I only hope he will give her some private counsel and let her know NOT to allow this to perpetuate itself. Otherwise, sadly, she is going to end up another statistic.