Thank you for asking. Feeling like masturbating or sexual tension in your age group is very natural and normal. If it is causing you from not able to concentrate, guilt felling, or irritability, you must learn a way to vent it out and that is by masturbating. There is nothing wrong in masturbation, as long as it is done for correct purpose and in a healthy way.
Next Steps
For knowing a proper techniques about masturbating you can ask a detailed query here on