In order to learn how to relax, you need to become familiar with your own breathing patterns and change them in ways that will help you relax. Your breathing.
Your penis may naturally have a slight curve in it when erect. is a sure way to ensure you are comfortable and relaxed when your erection is called upon.
Similar relaxation of the arteries supplying the penis allows blood to flow in, to stay relaxed, the more counterproductive the effects can be on your ability to get.