Sounds like you're asking the question because maybe you've had a bad experience. I'm sorry if that's true.
The honest truth is that not all partners are like that. Some are loving, kind and respectful all the time. That doesn't mean that they'll never have a bad day or say or do something that they might regret, but in general, they are wonderful good people who would never want to hurt you.
I have one of those good people. I hope that someday you find yours.