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The urge for masturbation, in my opinion, is mainly caused as a response to stress. Masturbation releases dopamine chemical in the brain, which masks the feeling of stress. However, there are other chemicals too which reduce stress and make you feel happy. These are a group of chemicals known as endorphins, which are mainly released as a response to pain.
I believe from my personal experience that endorphins can alleviate the urge to masturbate. They may or may not help you, but I strongly urge you to try.
Like I said, endorophins are released mainly in response to pain, so what we need is to feel pain. By 'pain' here, I do not mean the injurious type of pain, but I mean the good kind of pain, caused by activities such as intense excercise, taking a hot shower, or eating spicy food.
One of the best ways I have found is to do excercises which hurt. I feel a 'high' after doing them until I can not move anymore. They release enough endorphins to completely eradicate the urge to masturbate, for the day at least. So, why not you try and find out?
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That was the end of my answer, however if you need some help getting started, then these are some of the excercises which can tire you out in 10-15 mins of doing them:
• Dips.
• Pistol squats.
• Pull ups.
• Body saw.
• Decline push ups.
• Dumbell thruster.
• Dumbell side lateral raise.
(You may take a hot shower after excercise).