yes

It does not help to increase penis size, and it can be dangerous to the delicate tissues in your penis.

I believe it is something a man will do to grow his penis.

I assume by "help you" you mean "make your penis larger," in which case, probably not. As a penis enlargement method, you can bet that jelqing is either a myth, a scam, or both. You'll find that most of the 'success stories' about jelqing are very internet-based, if you know what I mean, and that it is mostly just dangerous. It can cause permanent damage to your penis if not done correctly.

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