I think porn is a red herring. Males (and females) are becoming more and more physically feminine by year, even after accounting for obesity, diet, and exercise differences from year to year.
I bet you a regular virile man from 1955 could watch modern day porn for a couple hours a day and could still fuck his wife when he felt like.
If I had to guess, I'd say the negative physical changes are the result of plastics, fertilizers, and pesticides in the food and water supply. And the fact that so many people take antidepressants.
