Well, by default sex is possible with every developed female in the new VN. The issue is the competition with an actual likable male antagonist - where, if you pick certain women to give your proper attention to, the others will consummate with someone else. Additionally, some women will have a current amor for which you have to best.
The idea is to get some classic love triangle contests (including FMF) where it is not NTR because the MC either has not yet won the girl, so she by definition is not being stolen away when she shags another male, or another male to lose a girl to if you are not pursuing her due to other pursuits.
Just a heads up, while that may not technically be NTR. People will 100% jump up and down screaming NTR if another male character is competing for the female characters. Some freak out at the mere existence of other males in some games. I'd also say to not make that character black, as it goes off the standard "black guy cucks MC" trope. If you make him likable and the players can avoid the girls doing anything with him then it should be mostly ok though. Can maybe have sharing/swinging routes in that game like in DMD, so the players can still have content with the other girls without romancing them (the other guys girls) or the other male characters can have content with them but they still be MC's girl(s).
Let me put this to (semi-)rest. MDots is the one who put forth the “sex with a dog” idea. Hearsz and I differ. Then a lot of fans differ based on “lack of agency” on the part of the dog - similar to why we don’t have underage sex, due to lack of agency.
Currently MDots has not countered the no votes from Hearsz and myself.
me, personally, I have three other reasons why dog sex sucks:
1 - I don’t find it sexy (but then, I don’t find foot or urine fetishes sexy, but we have a little of both);
2 - Imo, there is no way to make the facial features of a dog look sexy during sex - unlike that of a human; and
3 - Scientifically, sex with a dog is NOT about thrusting and friction, which is what would stimulate a human female vagina. Instead, it is about a dog locking their penis and vagina in place, turning butt to butt, and standing in place for 30 minutes to an hour while the female is inseminated.
I actually agree with your points here, but at the same time I don't think they're relevant to the game.
1- Yeah, I don't either but thats just an opinion.
2- True, but the thing is in hypothetical dog sex with D you don't need to show the dogs face. We haven't seen MC's face in this entire game. Any scenes involving dog and D would be heavily focused on D, the dog is just there to well, be there.
3- I just don't think thats relevant. This is a game, not real life. The game is based in a world that doesn't have pubic hair, its not a scientifically accurate game
a late edit: On the lack of agency, I actually think thats the opposite. Dogs will hump, or try to hump, almost anything. Legs, toys, other animals etc. The lack of agency would come from the human, in this case D. They just don't want to have sex with a dog. Having to come up with a reason a human would fuck a dog is way more complex than a reason a dog would fuck a human. and on your "dog licking" part, well, that could give D agency to actually have sex with that dog.