Throw Him Off by Getting Aggressive

You rack your mind for a way to surprise him. You think of something that he won't see coming. You decide to take a page out of his playbook, and attack him like crazy. You use every resource that your character has, in a way that you usually wouldn't, and Erik clearly becomes overwhelmed trying to discern your strategy. It looks like you got in his head, because he doesn't even manage to win a single round against you! You have taken the second match, and Erik's shorts along with it!

Clearly frustrated, Erik stands up and loops his thumbs through the waistband of his shorts. "What the Hell was that? You never play like that!" Erik exclaims, clearly a bit put off by his loss.

"Quit making excuses and drop your shorts." You press, smirking cockily in his direction.

He's not happy about it, but he does it anyway. Erik drops his shorts around his ankles to reveal a pair of cotton-white briefs and nothing else. His legs have a modest amount of hair, and they're just as toned as the rest of him. Reaching out, you playfully snap the waistband of his undies, and he jumps in surprise.

"Looks like you're running out of clothes, Erik!"

"Fuck you, let's just keep going!