Made worse by certain translations altering some of the dialogue and scenes. In certain translations, Peter follows his "big flabby grandma arms" request with "Just kidding!", implying the monobrow and transformation was simply intended to be a joke... but the rest of the scene isn't changed, and Mystique still goes down on him, seemingly forcing him into screwing her as a fat obese blue woman whether he likes it or not.
In others, such as the Spanish dub, Mystique is portrayed as being a bit more passionate at the end of the scene... perhaps too passionate. While she was seemingly starting to get into it near the end of the scene, the Spanish dub takes it up to eleven, having her moan extremely load as she grows fatter and fatter, and the ending makeout is portrayed as much louder, with Mystique clearly making out with him, tongue and all, as they both let out muffled moans. Had this happened two requests prior, it likely would've been a hot sight... but with the monobrow and fat body, not so much.