If you're not lasting longer than 10 minutes when having sex, then you're not masturbating correctly. Let's face it, we all masturbate. However, while some men use it to their full advantage to become better lovers in bed, others are crippled by it.

Masturbating can be like a double edged sword, and if you don't use it correctly it may make you ejaculate in less than 2 minutes. Even worse, some men ejaculate in less than 1!
What you might be doing

It's late at night, you get into bed, and you feel the need to relax. The first thought that comes to your mind is,
"If I masturbate I'll be able to unload, relax, and fall right asleep."

By the way, it really does help men and women fall asleep.

So, What's next?

You need some sort of visual to help you get really turned on. You then look at porn, get overly excited, and finish in less than 5 minutes.

We use it more for the purpose of getting relaxed and finding instant gratification, than training our bodies for sex.

That is where the problem starts.

The problem step by step:

"My goal is to get as turned on as possible, so that I can quick and awesome ejaculation."
You then look at porn until you're very excited, then masturbate.
You're so anxious to ejaculate and feel relaxed that you don't practice your breathing.
You stroke very quickly and hard, to get the greatest pleasure.
Before you know it you've finished in less than 5 minutes and have trained yourself for that amount of time when having sex.

Remember: Masturbating is the practice, and sex is the main event.

[Related: Can You Masturbate to Death? Boy Dies After 42 Times]
Perfect Practice Makes Perfect Games

When masturbating correctly to increase sexual stamina there's three key points to remember:

Purpose
Mental
Physical

These are the 3 main components of helping you to last longer in bed.

Purpose: image

Remember, what your purpose is. It should be to last long, and please your sex partner. You might automatically think "because the purpose is to last longer, I should focus on not ejaculating right?"

Not exactly. Instead think about pleasing your partner and controlling your anxiety. Don't think so much about pleasing yourself. Think more about how much of an Alpha male you are pleasing your woman and how great the sex is.

So, when masturbating make sure to control what you're thinking about. Do not get over-stimulated and simply think about enjoying the moment, as opposed to trying to get quick satisfaction.

Mental:

Controlling your mental state is similar to what I talked about above. Even though the purpose of masturbation is to please yourself, remember that it's a double edged sword. You have to learn how to master it, instead of it controlling you.

Remember that the best things are worth waiting for.

Physical:

Doing the right things physically is very important. Breathe constantly while masturbating. Most men will be anxious, full of adrenaline, holding their breaths until the point of ejaculation. You'd be surprised how simply breathing will do miracles for you.

Because your goal is to last at least 10 minutes, make sure you're not getting overly excited by minute 5, stroking away. Keep your strokes and muscles relaxed and controlled.

A few Quick Tips:

Urinate before masturbating or having sex.
Masturbate when you're not going to be rushed. Try when no one is home, or at night.
Put yourself in situations similar to sex. You can try using lubricants. You can also try thrusting while jerking.

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