OP: Because I don't like to see a story focused on in-your-face-cheating, trickery, backstabbing, humiliation and forcing a character into cuckolding. Even when they don't use those things but it's all about the slow corruption of a woman into the pleasure of sex, I don't care either. It's something I don't need, much like I don't even wanna think about injecting myself into the guy doing the stealing, it feels kinda silly to a certain extent. All I need is a harmless plot -you can go all out with your imagination though-, good-looking girls and good sex scenes, I don't need feelings of corruption, cuckolding and the likes. If I need feelings of 'forbidden' incest clicks just fine.
I hate most NTR mangas for the same reason I hate most vanilla mangas - cause they suck. But whatever, the majority of fakku doesn't really care about the quality of manga, just the tags.
I can acknowledge the quality but still find the work unfappable because of the content. I find 'Nyuu Paranoia' by Carn to be absolutely exquisite and yet stories like Otome Gari just do not work. Mokusei Zaijuu got great art, too bad so far he has only drawn rape or netorare.
Vanilla is for pussies, my friend.
Pretty much balls. Stealing someone
in fantasy, now that sounds kinda...yeah. It's the same as saying people masturbating to guro got cojones of steel.