Can't speak for the original commenter, but for myself, why should it? One, preferring to see sexualized content is natural. Two, it's fiction. These characters don't really exist and can't be hurt by it. Why exactly should I feel disgusted?
I guess you may have had an upbringing that conditioned you to feel repulsed by such things, or some other personal experience that did so. I and many others didn't. So there is no reason why we would feel as you do.