Why don't we just skip the formalities and compare penis sizes right now? Sure, but that just means they pushed themselves too hard. Congrats! You now cannot work that part of your body for a significant amount of time. How strong will that make you? Holy crap you're right! I'll go try and deadlift 700lbs so I can tear my hamstrings and dislocate a disk in my spine. That will make me stronger, right???? If you get injured in training, you are doing it wrong or there was an accident. Period. Not to mention, muscle doesn't even regenerate fast enough for it to make sense to go balls to the wall every single time. If you train to failure ever session you're not making much progress.