This pathetic wimp knows he can't beat me in arm wrestling, he just wants to feel my strength. I can easily overpower him with my strong, upper body muscles. He gets really turned on every time I drive his arm into submission. He's never felt big biceps like mine before and as they grow in his hands, so does the bulge in his pants. The more I flex them, the bigger they get and the harder he is. My bicep feels like it's going to explode...just like his cock.