Here’s the thing—as you have blood specifically filling the area that controls arousal, this is what you are going to work. It’s the same as exercising any other muscle. You can obtain the best contractions while your penis is erect. But you’ll notice as you masturbate, the harder it will be to contract the muscle during Kegels. However, the harder you contract the muscle, the longer you will be able to contract the muscle. This is where the magic happens.