Great point. I, too, get vexed when I see arguments for "variety." In reality, the proposal is just, "I can't get off to mothers having sex with just their sons, so even though there are plethora of different artists who cater to my particular fetishes, i.e NTR, blackmail, rape, etc., I like your art too much, so I'm going to complain about 'variety.'" Mother/Son incest is well and by far the most predominant theme broached in 3D works of this nature. Other themes don't even come close. And that's not to state that one as an individual has to like mother/son incest, but I do question the reasons that one would follow an artist's works, which have been predominantly mother/son and complain about their plots being focused on mothers and sons. That's like going into a pizzeria and asking for hamburgers.