The human porn Pearl would look at would involve lesbians, chubby and toned with sub/dom play thrown in there but as her mind gets more dirty, her interests expands.
honestly that'd be a real fun lil thing - especially if one were to track down a fitting voice actor to do a lil animation or audio or some such - where Pearl helps herself to Steven's computer while it's left running and finds herself gradually sinking down a rabbit hole, springboarding off a few questionable terms in his search history and steadily learning how best to use more and more terms to find what she wants
can just sort of hear Pearl snickering and giggling and gasping as she taps on tags that read like this, "Oh, my...." after finding out what BBW means, "Goodness, that's so....messy." when she finds some big, pink haired lady getting gangbanged, etc.
almost feels like it'd be more funny to me than outright sexy, but I think it'd walk the line pretty well with some good focus on where Pearl's other hand is, while the other's at the mouse/trackpad/keyboard, lol