your brain must have low cortisol levels for proper erections
the more you stress the more cortisol develops
>Cortisol constricts the blood vessels in your penis. When blood can't flow properly to your penis, that's when you may have difficulty achieving an erection. Over time, chronic stress (chronically high cortisol levels) decreases the amount of testosterone your body makes.
>Cortisol also inhibits testosterone, the primary male sex hormone, which is responsible for sex drive (libido) and might contribute to the blood flow changes that cause an erection.
>do any of you guys have no erection for some days
i dont have erection for weeks some times