I find, somewhat to the surprise of my libido, that I play most of these games to a much lesser degree for the sex than he stories, I know I've said that before. Sure, there are a few that are just lighthearted sex fun, but in that case it's well-made sex fun. Others are more about the story and the plot, about relationships and world building and so on. For those games, sex scenes are not really that important to me. Indeed, sometimes you suspect one is there just keep people happy, but that can have the opposite effect on me if it feels contrived.
And (needless) sex scenes takes away dev time from more important stuff!