[description: a vulgar portrait of male anatomy]
I don't have an objection to prurient smut, on principle. I think too many people have too liberal an idea of what constitutes prurient smut, but I don't think prurient smut should be censored (restricted, maybe - I understand that not everybody wants to see it - but not censored, and certainly not illegal), just because it's crass and base-minded. While some of our instinctual appetites can be hazardous to our own and others' health (see: violence), I think that it's healthy (and it's obviously pleasurable) to indulge the sexual impulse, so long as you are doing so in ways that are not overly excessive or unethical.
And on those terms, sharing pics of your anatomy on the internet (in the right contexts - not messaging them to strangers without provocation), is a pretty simple and harmless way to get your kicks, especially compared to navigating the extremely complicated field of interpersonal relations. Plus, as an exhibitionist, I don't think anyone would disagree that it's a more favorable hobby than flashing strangers on the subway (not that I've ever personally known anyone to be interested in that sort of thing, as opposed to trading dick pics, which is extremely popular - much to the enduring chagrin of polite-minded society).
Anyway, images like these - they're not really "artistic" in the sense that I'd like to believe a lot of my other images are, although I have a pretty liberal definition of what constitutes art - but when you get all up close and anatomical like this (which is not usually my preferred approach), I can't help feeling like they begin to take on an almost scientific value (more often than not, I find these sorts of images more "educational" than erotic). Shocking or not (and certainly I would privilege carefully culled photos, and not just any old snapshot of anybody's anatomy in any condition whatsoever), I actually think being exposed to images like these can be healthy.
Not just as a form of sex education - which, considering some of the comments I've come across, there are a lot of people who don't appear to have a firm grasp of how a penis functions - but also in the same sense that seeing all kinds of normal bodies in a nudist environment helps to ground your expectations and combat poor body image. When this part of our bodies is so meticulously censored in everyday life, and the only time we are exposed to it is either in our own relatively limited experiences ("you mean not everybody is as big as my last boyfriend?"), or pornographic media where actors are typically chosen for their exceptional anatomy, it can be reassuring to learn what an average person really looks like (why is it a big secret what people look like under their clothes anyway?).
I don't necessarily enjoy looking at closeups of the male anatomy in most cases (and even the female anatomy I prefer to view from a distance, where you can see the whole person behind it), but I've seen quite a few penises in my days of browsing galleries on deviantART, and I have to say, I think I'm better off for it, because it doesn't faze me like it would have in the past. And it shouldn't. It's just human anatomy. It's not that big of a deal.
[description: immodest closeup of an erection]
Except when it is that big of a deal. -_^