Wait is sex-repulsion why I enjoy sex scenes when they cause drama or add to the plot but not when they're in an established relationship and doing it regularly?? When it's for plot/emotions/drama I love it as a plot device but if it's just them doing it the "ewww why are they doing this" takes over...
Sex repulsion is likely the reason you don't like sex scenes when they're there just because. And for the plot device ... Do you still experience repulsion when watching or reading them? If so you might be completely sex-repulsed. If not, maybe you might be sex-ambivalent or, another word for it, eriscarnal.
Eriscarnal is a term under the ARCsexual umbrella for when one has conflicting and/or mixed and/or changing feelings towards sex.
Sex-ambivalent is a term that is used by asexual and other ace-spec individuals to refer to the fact that they have mixed feelings toward sex. Sex-ambivalence refers to anyone who does not fit neatly into the categories of sex-favorable, indifferent, or repulsed.
Sex-ambivalent people are welcome here too since they fall under the ARCsexual umbrella!