So you agree with me but you are criticizing my example. Whatever flips your switch man.
Oh and BTW just because a girl wants to fuck doesn't mean she wants to fuck your unprotected dick. Especially when you are in the dominant position and exerting steady pressure while also forgetting to mention that you are also having unprotected sex with six other girls. Sounds like the situation her mother warned her about.
I agree that MC's behavior is problematic at times. but for you, it seems to be at all times.
he is not in a dominant position, he is just on top. she can refuse, she can move away, push him away, kick him in the nuts...
he only had unprotected sex with 3 others on Earth. not 6. the remaining ones stayed at foreplay/oral. and for Luna, her main scene is in their astral/eternum bodies.
so you want to pull in realistic issues in a fantasy story? who says MC isn't testing his blood off screen several times a week ?
who says it's not the girls who could contaminate MC? who says the girls are not on the pill? or have other contraceptive methods? morning-after pill is a thing too. might be other methods in that sci-fi world.
again, you're removing agency from the girls, they could also decide not to fuck him, and more importantly, they could just ask him what his relationship is with the others, and stop hiding their own from the others.
if you flip it around, MC is just a single guy trying to find a nice relationship with a girl he likes, but every girl he tries to engage in doesn't want to take it seriously or actively asks him to keep it a secret. so keeping it casual for now is his only option aside from stopping it with everyone.
the only one that states her feelings out loud is Penny to Nova only. Alex does it to an unconscious Dalia so it doesn't count, but at least she is acknowledging it to herself now. Dalia half admits it to Alex but doesn't name MC because she is ashamed of him.
Nancy is the only that knows every girl likes MC.
Lust and feelings affect everybody's decision making, not just the MC's.