The Internal Stetch as the name suggests works the internal penile muscles (the part that is inside the body). Your erection level should be between 0 and 50 percent.
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Start from a sitting position with your legs spread apart.
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With your first hand make an OK grip and place it around the base of your penis with your testicles hanging out of the grip.
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Move towards the head of your penis with the same hand, stretching your penis and testicles straight up.
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Simultaneously with your second hand grip your penis an inch below the glans also pull straight up.
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Hold both hands in place for twenty to thirty seconds