I made this to go along with luggys "The more I play with my cock, the more I become a jock"-mantra:
http://writeforme.org/writingtask.php?task=22783&accessCode=jock
It is rather simple: Go to that page and you will be asked to type exactly that line. Ten times.
However, there is a catch... if you mistype, you have to start over for the current line and another line is added as a penalty. If you stay idle for more than 5 seconds, another line is added. The additional lines can pile up pretty fast... stay focused and repeat after me: The more I play with my cock, the more I become a jock
...oh, and let me know how it worked out for you :-)