Now it's really going to hurt, tie the other small weight on.(If this is enough weight to make your spermatic chords ache, just stick with one small weight, but slap your balls 10 times really hard for being a pussy!)
Stand up, and make sure the weights hang slightly lower than your knees. Put the weights on a table, or a desk, something that is the same height as your waist. Now close your eyes and walk backwards. You may scream if you feel it's necessary, but slap your balls 10 times really hard for being annoying!
After you've done this you may remove the weights(but not the string), and continue.