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My dear, Premature ejaculation
is not usually due to problem of penis. You seem to not be confident in yourself and is suffering from performance anxiety
. You need t understand that sex is mainly in mind. You need to engage more in foreplay with your partner. Also try this technique. When you are having sex and you feel your semen is going to come out, then you withdraw your penis and ask your partner to gently press the tip of your glans penis
with her finger and thumb. This will prevent the semen from coming out and you can do sex more time. You can repeat this for many times as you want and have long time sex. Enjoy. If this does not work you can consult Psychiatrist
who will offer best advice and solutions.