Sakura-Chan, Chi-Chi, Winry, they all do it out of love. Because they care. My fiancee kicks my ass all the time or she at least scolds me non-stop when I do something stupid or I say something stupid, but at the end of the day, it's out of love. And like Naruto, Goku, and Ed, I love the fiestiness behind it, the fact that I know she cares. If she isn't hitting you or at least scolding you when you do something stupid, but she is instead encouraging you and acting like she doesn't have a problem with it, then you need to re-evaluate how she truly feels about you in my opinion.
Hell, my wife slaps me on the arm if I say something stupid and inappropriate or upside the head if I'm being deliberately rude(since I am a bit of a prick IRL).