You barely close the door to your bedroom before you start stroking your huge cock. Harder and faster. Your new cock and balls are just as strong as the rest of your huge body and you go for hours, jerking off and not getting tired, just harder. Then something happens, your muscles are straining as you try to finish off, the intensity of the stroking is causing your muscles to grow just as they did in the workout session. Your pecs and arms inflate, ripping the shirt on your body until it hangs in shreds around you. As your cock explodes with cum, your new super testosterone causes your cock to swell and grow. You look in the mirror at your taller, buffer body and decide to get dressed and go out as your cock gets hard again.