I see this argument a lot. I don't think it's true at all (at least, assuming you're not talking about teenage boys). Consumers of porn are picky and choosy about porn just like they are picky about anything else they consume. Better porn beats worse porn.

Nakedness is not sufficient at all. It's kinda hard to get off if you are doubled-over laughing at how lame the porn is.

Agreed. With so much free porn online, everyone has be come a connoisseur. What stands out is experience, quality/niche, and convenience. I found this reddit thread on who pays for porn and why an interesting read.

http://www.reddit.com/r/AskReddit/comments/2i5cf6/redditors_...