[EvilCapitalist]

Too much porn out there. The youngsters need to save themselves for the real ladies.

[Bayard]

Yep. Porn is one factor, also I question drug use and or lifestyle changes from outdoor activities to indoor video games.

Less muscle leads to less testosterone.

[cherry]

"Too much porn out there. The youngsters need to save themselves for the real ladies."

preach it brother....we need babies....

[rollo tomasi]

There has always been plenty of porn out there. Also, masturbation wansn’t invented in the late 20th century.

One substance that was extremely pushed in the second half of the 20th century was progestin along with estrogen in pill form that lingered in the body still when some chick wanted to finally conceive.

[EEGator]

Porn has a deleterious effect on society, but decreased serum T isn’t one of them.
Nutrition, weight training, and proper rest are large.

Constant stressors, popping scrips, processed high carb foods, xenoestrogens and phytoestrogens, and lack of sleep and exercise are big contributors.