In my opinion kegeling is the most important and most basic exercise for good penile health there is. While stretching and jelqs have helped me regain my length I had when I was a young man. When I was 21 I was a strong 7” measured on the top with light bone pressure and at 54 I was a tad less than 6.5” pushing as hard as I could. Now at 56 I measure just over 7” with light bone press (much to my relief) , so my goals have been met and any other length I gain will just be a bonus and for fun. I feel that kegels have done more for me than anything else and the importance of them can never be under stated.
When I first started kegling two years ago I was very weak and had a hard time with them but over time I have got to where they are second nature to me. I run heavy equipment and have developed a rhythm while working that has become second nature. I never just do a bunch real fast to get them over. I vary my pressure and length of holding them. I will start with a light squeeze and gradually bring up my level to as hard as I can and then relax slowly and then without letting up all the way bring it back up to as hard as I can. I also will find myself kegeling while I walk, and driving down the road I can hold real tight for just over a mile or if I do a light squeeze I can go for two miles (actually I could go longer but that is enough) While I have started and stopped doing my other exercises I have not quite the kegels and plan to never stop.
For young guys with better muscle tone it probably is not as important but as you age both your muscle mass and tone change. Believe me it is much easier to work to keep a good muscle tone from the time you are young then to try to get it back when you are older and trust me, we will all get older. So for my opinion, make sure it is in your exercise program and never stop. For there is much more to having a good penis than length.
Also I have read that it is very good for the prostate.
Necogy