I own and drive a Prius at home and drive a Ford F350 SD truck (or sometimes a Tucker Snocat) at work. Maybe I'm AC/DC? Nope - straight for 58 years.
I have no idea where the stereotypes about car preference and sexual preference came from, although when I see a flagrantly macho car I hear Shrek saying, "Do you think he's compensating for something?"
I am a techie and appreciate the design and efficiency of the Prius. It is also supremely reliable and more fun to drive than any car I've had except a Lotus Europa - yes, more fun than the too-heavy 300ZX I traded in for my wife's Prius.