This episode was a bit of a sample platter of groups of perverts that are large enough to be considered their own thing apart from the "mainstream hentai masturbators".
The "giving up porn was a waste of time" guy's rant used quotes from a 4chan sub-subculture that preaches the evils of masturbating to pornography because of "the effects this has on your dopamine and testosterone".
Yes there is a sub-subculture of 4chaners who go around telling other 4chaners to masturbate less.
And the "Her Pussy Smelled Like Fish." guy is not alone either. Among the many manifestations of all the problems affecting Japan's birthrate is the open declaration of many men and women that they find physical sex revolting.
It happens to singles:
http://www.medindia.net/news/Government-Says-Young-Japanese-Losing-Sex-Drive-79507-1.htmAnd when it happens to married couples they call it "sex disgust syndrome". It is all explained in this delightful article full of depressing quotes:
http://www.japantimes.co.jp/news/2013/08/31/national/married-or-single-japan-is-a-desolate-country/#.VOq4Ey6Q9xANot ALL of them masturbate to cartoon porn exclusively, I'm sure, but I'm sure in some cases that could be a leading factor. Behind the horrible living conditions, work hours, cost of living and the saving-face-and-being-proper lifestyle.
But of course what could be said about Japan's sexuality could fill a book. A depressing, disgusting book that read aloud could summon a tentacle monster and make him vomit his lunch into his non-Euclidean porcelain throne.
Do you want to ask me about the phenomenon of Japanese mothers helping their children "focus" for university entrance exams? Of course you do not.