It's curious, but I think the most complete and graphic sex scene between the relatively "important" or secondary characters is the one Alessandro has with two guys, and it's a gay scene. The other scenes are short or extras. It's true that there is a lesbian scene of a woman licking another woman's nipple. And curiously Alessandro is the only character who repeats in another sex scene but short. I don't even remember a very graphic scene of the character Scorpus. Or the scene of Titus, it is also very light. Maybe my memory is failing me, but I don't remember anything else, I mean, I think the most powerful scene is the gay threesome.
"and most of them were to further ratings with gore"
Blood and sex, it's what sells the most, but honestly, I really didn't expect the series to be the new Spartacus, with lots of sex, I didn't even expect Alessandro to have scenes like that, and surprisingly I was very stunned to see him in that threesome. It was great.