COMMENTS: From the study we can conclude-
- Nocturnal erections are testosterone dependent, but wakeful erections are not.
- Supplementary testosterone given to men with low testosterone had little effect on day time erections associated with watching porn.
- Erections from watching porn or physical stimulation of the penis involve a testosterone-independent system. In other words, they depend on the brain and dopamine.
So get your testosterone checked, but realize it’s not related to porn-induced ED
J Sex Med. 2005 Nov;2(6):771-84.
Montorsi F, Oettel M.
Istituto Scientifico H. San Rafaele, Milan, Italy. [email protected]
Sleep-related erections have been reported to occur from the intrauterine life to senescence. It has been speculated that the main function of nocturnal erections is to provide adequate engorgement of the corpora cavernosa, which then leads to increased tissue oxygenation. This is in turn to prevent cavernous fibrosis, the histopathological basis for corporeal venoocclusive dysfunction, which probably is the most common cause of organic erectile dysfunction. It has been suggested that sleep-related erections are triggered by the release of nitric oxide by the nitrergic nerve fibers within the cavernous nerves. Androgens regulate this mechanism as well as some other non-nitrergic processes within the corpora cavernosa and within the central nervous system.
By contrast, the erectile response to tactile or visual erotic stimuli in wakefulness predominantly involves an androgen-independent system, although it may, at least to a certain degree, also be influenced by androgen-sensitive mechanisms. No doubt, androgens are key players in the physiology of nocturnal erections, and the availability of new, user-friendly testosterone preparations such as transdermal gel and intramuscularly administered testosterone undecanoate stimulates further investigations on this field. The prospect that the quality of sleep may also be improved by an androgen therapy administered to improve sleep-related erections in hypogonadal men needs further basic research and appropriate clinical studies.