Click on the picture for Wikipedia (work safe) details.

Thats more like a warning label... Then there are the side-effects...

Alex,

I thought you were talking about the Triskelion...



It always seems so oddly "above ground" when a giant "Leather Flag" flies from the flagpole on the corner of Castro and Market....

I could have, but that is much less widely adopted and figured I'd present the image that most people are likely to have seen but not recognized for what it was.

(And I just stumbled upon the corporate filter by unintentionally clicking a link that goes to bdsmrights.com so I'm not going to search any more for a triskelion photo.)