What causes erections?

Here are some... All parts of biological body are magically designed and composed in such a way to function coherently so to survive, grow, continue, and procreate. For penis, through "perfect" coordination of nerves, blood vessels, and muscles, the blood is diverted into the chambers of penis with its outflow temporarily shut so to maintain its needed rigidity for coitus to procreate. More? Ask and study...

Related Questions

What causes erections, even when there is no physical stimulation?

Here are some ... You get erection because your body can selectively divert, & store the blood to the corporeal bodies of the penis within desirable pressure. These processes are accomplished by the well auto-regulated healthy nerves & circulations so to run the recycle of arousal, erection, orgasm/ ejaculation, detumescence & rest, but may be affected by drugs, lifestyle with progressive vulnerability over aging. Read more...

What causes an erection to twist like a cork screw completely losing form? This only happened one morning but erections weak afterwards.

Penis scar/contractu. The change in appearance suggest scar or contracture. Unclear if it can be erect one time or always. There may be a blood supply problem also since you describe it as weak. Your urologist can help you. Read more...

What could cause painful erections?

Erections straight? Other than inflammation and infections, conditions that cause scar formation of the penis or urethra may cause painful erections. One such condition is called peyronie's disease, but it is mostly associated with curved penis. Read more...

What can cause painful erections that leak fluid?

Abstinence? All young men will get uncomfortable, often severely so, if they don't ejaculate every few days by whatever means. If this is you, then man up and do what you need to -- you should enjoy it. If the erections are intractable, and especially if the bottom part and glans aren't hard, it's a medical emergency. Get seen. Read more...