Sexual arousal directly raises humans threshold for disgust. Ie something that would seem gross when you’re not aroused could seem appealing or even exciting when you are aroused.
if you don’t know that and end up watchong something you’re normally not in to it may result in distress when your disgust threshold returns to its baseline and you can’t account for why you were excited by something you usually find gross.
widespread ignorance of human sexuality makes it difficult for people to ever learn what is and isn’t normalml.