I've read statements from men on various forums claiming that PE exercises aren't safe. I believe that to be incorrect. Sensible PE combined with stamina work will only strengthen your penis over time. Erections start to falter when you go over your limits in a workout, hurt yourself, or are in need of a layoff. To ensure that you don't suffer from ED you'll need to increase in intensity and volume in small increments each subsequent workout.
PE not safe? 
Linear Mode
