Why do 30% of 18 to 25 year olds have ed?

I don't think you'll find a scientific answer on that. People could theorise any number of things - stresses of modern life, body image issues from changing perceptions in the media, rise in mental health problems, changes in environment, changes in diet, changes in physical fitness, changes in the way young people can seek help with ED. We could also theorise that it's the rise in high speed Internet porn (particularly when used during adolescence) as many people report resolution of their ED when following NoFap.

http://yourbrainonporn.com/erectile-dysfunction-question

 

If the number truly is reported as 30%, it would probably be a low estimate since many 18-25 year olds still haven't had sex. Therefore, they wouldn't know if they had E.D. or not.

 

Porn induced darwinism.

 

Normally I trust Gary Wilsons links without investigation. http://www.huffingtonpost.com/gabe-deem/us-navy-reports-porn-is-s_b_11968942.html
" several US Navy doctors documented a near 1000% increase in youthful ED, pointing out that 15 years ago ED among men aged 18-40 was 2-5%, and all studies assessing youthful ED since 2010, shortly after the dawn of porn “tube-sites,” report ED rates in the same age group around 30%. "

It seems it is porn who have to take the blame for this one (as well)
"Two showed improvement after giving up internet porn use. A third was unable to quit."

 

Is there a source for this?? 30% seems way too much to be true

 

Yes, I posted the link in my first post.