I think perhaps a fellow to fan you all day might be the ticket, or perhaps a carpenter to build a wee shelf to increase air flow.
Even better: a bra with thermo-electric coolers. Those are those solid-state devices that they use in refrigerators. .
Themo-electric coolers don't have fans. They're solid state. Of course, you'd need to carry a battery to power it. .
I suppose if you are in a sunny climate, you could wear a solar panel on your back that would run the thermo-electric boob cooler. That's pretty good. Cool, hippy, and eco-friendly. .
Eureka!! After 8 pages, we have discovered the solution to the problem that is boob sweat. What about sweaty balls?
Dammit, I forgot about that. In that case we need something else, I suggest women cool there boobs by one of the following - Ice cubes, cream, any sensual product you might keep in the fridge - they move to the antarctica - or each women removes their tops. Clothes, who needs 'em eh?