For those of you runners who look askance upon your shirtless brethren, perhaps you'll accept the following experiment:
Simply go shirtless in your runs at least three consecutive times. Chances are you've never done that.
Don't run less or more than you would normally, though you may wish to vary your route or when you run slightly if you'd rather not encounter anyone you know (I know how that feels).
I wouldn't be surprised if many of you find that, after that taster, you'll feel a lot better-disposed to us even if you decide you'd rather not 'turn shirtless full-time'.
If you feel like writing in describing just how much you remain unconvinced, that response will get its due too. And you'll have my thanks for bothering to research what you criticise.
(Full disclosure: I've already run the experiment in reverse, at my wife's urging. I once put on a tank top and ran for a week. It didn't take.)
May 2015: First up, though I still try to put up blog content whenever I can, it has been easier to more regularly visit the the Twitterverse. Follow me at @barethomas10 and let's keep the shirtless running flag flying. Of course, the blog still attracts very interesting comments, and good discussion. Keep it up.
Second, in the years since this venture launched, and as shirtless running among women has gone increasingly mainstream, the term "jogbra" has clearly declined in use. I will thus prefer "sportsbra" henceforth - as has already been the case on Twitter, and in recent posts here.
I continue to welcome guest posts (sent to firstname.lastname@example.org) on any related topic, including from those who would discourage stripping to the waist. I am myself of course a fervent convert to the joys of running bare. But let all voices be heard!