You speak interestingly about the mechanisms of arousal, but you fail to make the case that “porn is evil”. You say that it desensitizes us, but don’t show why that is bad. Doing most pleasurable things a lot makes makes them less pleasurable. Masturbation desensitizes similarly. Is it evil? The tenth watching of a favorite movie is less pleasurable. Is Star Wars evil. You claim that that desensitization harms our sexual relationships, but don’t make that case past citing another article – and one that doesn’t really make your point about desensitization.
Remember, nothing is alleged to--or can have--happened to all of MLB over some one or two seasons: the claim is that PEDs were being used at a slowly but steadily increasing rate (and thus "distorting records") from very roughly 1980 through the present. Were that so, or anything like it, we would expect to see a clear long-term uptrend during this period. But we don't: we see a nearly flat line that, if anything, slopes slightly down. The "boost" just isn't there. But that doesn't seem to stop anyone from talking about it.