Small MP4 Version -
I punish myself by punching my own balls. First I start off in boxers and get the dull pain going. My cock gets hard from the action so I get naked and keep pounding my own nutsack. I twist my cock and squeeze my manhood until it looks like it will pop.
Wincing in pain, I stroke my dick and can feel the huge load run up my shaft. The secret to smashes your own nuts is that the cumshot feels really good and is usually large.
My hot load squirts out in a huge rope fashion. I give it a slow motion zoomed in replay because even I am impressed! ;)