Although the exact cause of premature ejaculation
is not known, new studies suggest that serotonin, a
natural substance produced by nerves, is important.
A breakdown of the actions of serotonin in the brain
may be a cause. Studies have found that high amounts
of serotonin in the brain slow the time to ejaculation
while low amounts of serotonin can produce a
condition like premature ejaculation.
