Ew...
Well, for starters the best NTR artists understand what makes a girl get into it so they always make sure to show you all the erotic things that make a woman be hawt. Not like those other Vanilla artist that just want the pleasure of the MC disregarding the pleasure of their partner. It also let's you understand as a human being that being "nice" is not the only thing you should strive to be towards your partner. YOU have to understand their desires and needs if you want to make your relationship work.
Also good NTR always does creampies and that's freaking hawt. nothing hawter than actually making a new generation.