You're probably thinking of the pornographic ones. Nanashi did a lot more that were non-pornographic (though some can be classified as "ecchi" due to nudity on both Naruto and Hinata's part).
He's always swapped between the two, I just think people tend to remember the torture
Beyond just swapping even a bunch of the bullying and torture often has a weirdly affectionate edge to it. It's a strange combo, but it certainly makes his stuff distinct if nothing else.
Jeez~... You kids...Welcome home,Asuka.Shinji.Didn't I tell you I'd be late and you should eat without me?We asked papa to wait because we want to eat with mama~I'm back,We'll have dinner soon.We wanna eat with mama~Papa, I'm hungry~