I Think you are confusing things, im not saying they all need to be the same scene, but that all of them should have at least 1 scene with a bj, and one with anal. look at the teachers for example, with 4 women, its always vanilla sex for them, and you get only 1 handjob, and 1 blowjob, total.
roxxy you see around 6 or so sex scenes, and they are all vanilla sex, with the exception of 1 anal, that still reuses the same normal sex one(not that im against the same pose being used for both anal and vanilla, if anything i would actually take that instead of just vanilla).
mia is even worse, you get what? 2 or 3 scenes? and that's it? same for the friend's "not-mom" except her case is even worse, since they are all vanilla scenes, no matter what.
the game suffers alot because of that. the aunt as well, she has alot of scenes, but i dont think she even does anything besides vaginal sex or being milked. he could at least played with her milking him instead, or even going further with she wanting to "drink his milk".
but nop, its the same thing, but from diferent angles basically.