Brief Answer:
Don't Think ,
Masturbation is harmless.
Detailed Answer:
Dear Friend.
Hi , I am Dr Anshul Varshney , I have read your query in detail , I understand your concern.
See, i can assure you one thing that Masturbation will not cause a direct harm to your sexual life ever , the harm you can have is by thinking all this.
Trust me , masturbation is a natural act by humans , everyone does it. It does not make you weak , it doesn't interferes with your sexual life later.
Performing during actual sex and giving pleasure to your partner is related to so many factors like your feelings for the partner , your confidence. If you will keep feeling that you won't be able to perform because you used to masturbate , you will definitely have problem in performing.
Masturbation has no relation with
pregnancy , as masturbation can not make a person sterile.
Your weight and height have no relation with sex. They are just related to your physical appearance that attracts your partner and adds up spice during love making.
Trust me , stop thinking all this. Do not take any medicines for this purpose , donot read irrelevant things on google.
This is natural act ,you will perform well naturally.
This is my personal opinion based on details available here. If you have any further query, you may please ask me.
Stay Healthy.
Dr Anshul Varshney , MD