Làm cho nó phát triển và tồn tại lâu hơn

...your penis to too much strain.

Apply these exercises regularly, ideally every day.

It is advisable to relax your member by having a warm bath to loosen the muscles.

This is a good way to start.

Before you apply the techniques, it is necessary to oil the penis thoroughly to make it supple, warm it and enhance blood circulation.