The best way to cancel something painful is to introduce something equally painful but less damaging. That way maybe our brains get confused in distributing the pain signals and so therefore in a way it is lessened dramatically, it's being cancelled now. They say the only way to differentiate pain from pleasure is to experience both at close intervals. I think it will be more effective if the two don't take turns. Pleasure after pleasure and pain after pain would mean an advantage.
Peoria IL Photography