Viagra was discovered by accident (it was a heart medicine that didn't work out). And I've never understood why it's sneered at. Are there really that many people out there who could face no sex again ever and shrug it off? I think that would be utterly soul-crushing, worse than most of the diseases they have charity walks and telethons for.
They don't rant about it because it solves a truly-no-sex scenario, but because it's essentially a recreational drug for the majority of users.
I think the ability to have sex is at least as important as the ability to not piss yourself (e.g. incontinence medication) if not more, but still, its profit center comes from its recreational use. That's why the drug companies love it.
Because there is no reason to believe that the % of men who have true ED matches up with the amounts of Viagra sold; because I've known many young men who talk about getting drunk or high and taking it, and because their companions agreed or in the least were not surprised; because the market for it online seems to be mostly young, healthy men who want to have greater stamina, not who have anything dysfunctional to begin with...
You don't see the tremendous amount of selection bias in your sample?
Very quickly: people who need viagra don't like to talk about it, unlike drunken frat boys. The online market is targeting men who can't get it from their doctor because they don't have ED. That doesn't mean the vast majority of viagra users aren't suffering from ED, it just means that online ads are targeting a niche market.
