I've noticed a lot of toxicity in guys into wedgies. From guys so deep in the closet to people who think you can justify going behind your partner's back to engage in something that satisfies them. I really don't understand it. The ignorance behind justifications because people are so ashamed of being into something outside of societal norms, blows my mind. If you have a person you are in a romantic relationship with, you cannot define what you do outside of that relationship as acceptable if you are going behind that person's back. Regardless of what it is. It shows how horrible of a person you are. A relationship demands honesty and respect, always. Even when you disagree. If your partner doesn't know about your kinks and you're doing stuff to satisfy that, you're in the wrong. I'm sorry, but it's not okay. And sure, use the wedgies as a prank mentality, but I don't know many guys who have given wedgies as pranks who are on forums and Instagrams and Tumblrs dedicated for wedgie content.
Just because it isn't stereotypical sex, doesn't mean it isn't cheating. If you have to hide anything from your partner, you're doing something you shouldn't be.