One study in Sexual Medicine, found that that porn use did not predict sexual dysfunction, but instead, predicted higher levels of sexual responsiveness.
Another study analyzed European men from Croatia, to find that there was no reliable connection between porn use and sexual dysfunction. The study reports that there was no statistical relationship between ...
Most of the information on this subject appears to come from the work of Pourmand G, Alidaee MR, Rasuli S, Maleki A, Mehrsai A. at the Urology Research Center, Tehran University of Medical Sciences, Tehran, Iran
The severity of ED correlated significantly with the level of exposure to smoking
Source: Do cigarette smokers with erectile dysfunction ...
Here's a list of about 17 studies that link porn use to sexual dysfunctions and lower arousal. The first 3 studies in the list demonstrate causation as participants eliminated porn use and healed chronic sexual dysfunctions.
The paper (not a study) published in "Sexual Medicine Open" (Prause & Pfaus, 2015) has been critiqued in the peer-reviewed ...
I'd say that the class-action lawsuit that the makers of Extenze have to pay on tells the story pretty effectively: ExtenZe Class Action Lawsuit Settlement
An extract from the class-action statement is given below (my emphasis to highlight the false claims):
A proposed $6 million settlement has been reached in a class action lawsuit against the ...
The study is here:
J Sex Med. 2013 Mar;10(3):844-56. doi: 10.1111/j.1743-6109.2012.02898.x. Epub 2012 Oct 4.
Efficacy and safety of once-daily tadalafil in men with erectile dysfunction who reported no successful intercourse attempts at baseline.
Shabsigh R1, Seftel AD, Kim ED, Ni X, Burns PR.
Potential for long lasting cure
The study shows that in a ...
Per C Persu et.al. in 2009 regarding a practical update for treatment of erectile dysfunction,
Pelvic floor exercises may reduce ED, although there is only limited evidence supporting that theory.
Pelvic floor muscle exercises could be considered as a first-line approach for men seeking resolution of erectile dysfunction without pharmacological and ...