› firstname.lastname@example.org 
You once ran from a letter from "Stretch," who was interested in stretching his scrotum. As someone with naturally occurring low-hangers, let me just say they seem to have minds of their own, finding their ways into the most unexpected places. A playful smack on the ass from my boyfriend can leave me writhing in agony. Even sitting can be risky. I don't see any advantage to having low-hangers, unless, of course, Stretch finds them aesthetically more pleasing than more traditional balls.
People who write in for ball-stretching advice rarely mention why they'd want to do such a thing, come to think of it. While many, I assume, are seeking sensations having something to do with gravity, drag, and, um, wind resistance, I'd file permanent scrotum-stretching with all the other piercings, dilations, and bifurcations. They are varyingly extreme expressions of the human yearning for self-transformation. While most people are content with, say, coloring their hair, decorating their skin, or acquiring an annoying faux-British accent, others feel driven to use their bodies as a plastic medium. While I agree with you that altering a particularly vital and vulnerable body part to swing ever more freely in the breeze seems ill-advised, it is not particularly surprising.
So, what is surprising? How about www.houseofgord.com ? I'd never seen it myself until last week, when I was hanging out with the usual band of geeky freaks, plus some new ones with new freakinesses to share. At some point in these evenings someone will pull out a laptop, and then it's time for show-and-tell, pervert version. This one is dedicated to human transformation into ... furniture. That's right: chesterfield fetishists. Breakfront freaks. OK, I exaggerate — tables and chairs are more common inspirations, but there are also numerous ceiling fixtures and a human lawn sprinkler. You can, apparently, make a lawn sprinkler out of nothing but a girl, a rubber suit, some tubing, and — oh, never mind. I can't describe it. You'll have to go look for yourself.
I think I have a crazy foot fetish. I love it when a woman gives me a back massage with her feet. I like it when a woman knees/kicks me in the balls and I fall to my knees in pain at her feet. I reckon I would probably love it if a woman continuously kneed/kicked me in the balls until I surrendered. What's wrong with me?
Eh, nothing much. You're a run-of-the-mill kinky foot-fetishizing ball-kickee male submissive; join the pack.
Getting groin-kicked is surprisingly common fantasy material, although perhaps unsurprisingly, few guys really wish to act out the full-contact version. Many men, for instance, are willing to pay a well-shod woman to sorta kick them in the balls. Of course, there are people who wish to go all the way — there always are. For every few thousand fantasized castrations, there's one superdedicated guy who actually goes out and does it. Hell, there have been at least two cases where someone who wanted to die actually contracted with someone who wanted to kill, the most famous of which involved not only murder but cannibalism. It does, indeed, take all kinds.
Compared to some of those kinds you are hardly weird at all. What you might be, though, is unfulfilled. While there are numerous "goddesses" and the like willing to pop you one in the nuts, most will charge you stiffly for the privilege. If you can afford it, great. Otherwise, there are of course fine consumer products available from places like — you guessed it — www.groinkick.com .
There are reasons besides money why many men would rather dream of being groin-kicked than actually experience it, as should be obvious upon a little reflection: It hurts, and it can cause permanent damage. Do be careful.
I used to kick (and knee) my brother in his testicles a lot (I still do sometimes). He thinks that he can no longer have kids. Is this true? Can a guy be unable to have kids from being kicked in the testicles?
You still do this? What the hell for? Do you think it's funny?
That wasn't a rhetorical question. I really do hear quite often from men who find that women think kicking them in the balls is funny. As I've written before, it seems to have some sort of pseudofeminist, "get back at ’em and get ’em good" kind of component, but you know what? It's not political, and it's not funny. It's just loutish, stupid, and mean.
It's unlikely but possible that your brother has been rendered infertile by your mistreatment, especially if both testicles are badly damaged. He ought to have his balls examined, and, if he's been allowing you to beat him up all these years, perhaps you both ought to have your heads examined as well.
Andrea Nemerson has spent the last 14 years as a sex educator and an instructor of sex educators. She is currently preparing to give birth; thus we'll be rerunning some of her favorite columns from adventures past until she recovers. Visit www.altsexcolumn.com  to view archived columns.