Can Smoking Weed Everyday Cause Erectile Dysfunction damages blood vessels, causing narrowing and hardening (atherosclerosis), which restricts blood flow throughout the body, including to the penis. An erection requires increased blood flow to the penile tissues, and any condition that impairs circulation can make it more difficult to get or sustain an erection. Smoking has been shown to lower testosterone levels in men, and testosterone is a key hormone for cenzura-spam desire (libido) and erectile function. Low testosterone can reduce cenzura-spam drive and make it more difficult to get an erection. Smoking can also lead to other hormonal imbalances, which can further contribute to erectile problems.