As was mentioned in one comment to yesterday's post, we're clueless in our young days. The information we get comes from those who know as little, or less, than we. So, masturbation makes a terrific learning tool.
I can't tell you how many times in my younger days I shot my load long before I was truly ready for the experience to be over. Through masturbation, we can learn how to control our orgasms; to cum when we want. Which helps us in our future sexual relationships.
Becoming familiar with our own bodies is key. If we recognize the "point of no return" - that all-consuming fraction of a second that an ejaculation is triggered
we can change up the stimulation to stop it from happening.
On the flip side we can encourage and pull that hammer back, and fire away.
How many times have you said to a partner, "No! Not yet!" and been helpless to hold off?