I mentioned about a mile back "Thomas Jefferson rape" though, there's no force there, but there's implied force, maybe, sort of, and I think this is probably the most disturbing element of this matter, because Jefferson raped not with force, but with a power imbalance, and there are lots of husbands who have the kind of power over their wives' lives where you could argue in a law court that it is like a perpetual power imbalance, given the power the husband has to inflict damage on his wife's life, lifestyle, livelihood. At the drop of a hat.
Jefferson didn't force his Black slave woman to have misplaced marital relations with him, but it was certainly rape, that's the sticking point. Fortunately the burden of proof is heavy for the prosecution so it protects innocent men from felony perjurers, but it's unfortunate for those rape victims who are left with a very heavy burden of proof. Should we shift the burden of proof, for just rape? The Justice Kavanaugh confirmation hearings testify against it. It would be worse than that was.
Thomas Jefferson rape is more like child rape, it 'doesn't leave a mark' but it is most certainly rape, and it is violent, even though it doesn't necessarily leave a mark.