Forfeit

Erik has you right where he wants you. You know that you can't actually fight him off. He's too strong. He's going to keep his hold until you lose after spending a particularly humiliating ten seconds trapped in his grasp.

So, you limpen your arms, and accept his hand wrapped around your cock. He seems confused, and momentarily adjusts his grip, clearly wondering if you're actually surrendering to him.

He has unknowingly given you an opportunity. There's an opening. Surge forwards hard enough, and you should be able to break out. Or, you can go with your original plan of just standing there like a good little bitch and letting him play with your pecker. So, what's it going to be?