Best Answer - Chosen by Voters
As with most things, practice makes perfect. The more we practice the more something becomes a habit. Because of the feeling good factor, however, guys tend to figure different ways to do this so there is variety.
Interestingly, guys tend to go at peaks and then slow down, so there is never anything as too much or too little. Those are relative judgment terms. As with most aspects of life, however, moderation is the key.