There was a time when I would have said, because he promised this at the start in his mission statement & because this used to be an adult VN, as in written by an adult for adults. It was erotica. Erotica is a story with sexual themes & situations in it, for which at least a veneer of realism is required, as opposed to porn, which is a load of meaningless sex looking for a story & then usually deciding not to bother. These days, although the two categories overlap in fiction, as occasionally in RL, I would say that "realism" is invoked by the Dev whenever the issue of not enough sexual content is raised. Realism in truth was cast aside a couple of years ago, both side jobs prove it but especially the second, which is pure porn hokum.