Kegels exercise is a work out invented by Dr. Arnold Kegel which involves contracting pelvic muscles. This is a proven method in strengthening male erections as well as preventing premature ejaculation. Scientists also say that this can help reduce the risk of erectile dysfunction
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The Pelvic Floor Muscles are the same muscles used to control urination.

n Kegels Exercise are usually done in sets wherein pelvic floor muscles are contracted and released repeatedly.

Here are a few methods:

Quick pumps

Try doing 15 reps of quick pumps, rest for half a minute and repeat. From 15 you can increase the number of reps as you can.

Hold and release
Contract the Pelvic floor muscles slowly and hold or 5 seconds, release gradually. Do at least 25 reps two times a day.

The Elevator
Slowly contract the muscles 1/3 of the way, pause, and then 2/3 of the way, pause, then all the way. Do 10 reps twice a day.