When I was fresh out of high school, I got a job at a video store that had an 'adult' section. Purple beaver sounds like a title that would fit right in.
That must be its official name too, since I've seen it hanging on the pegboard at the local fly shop. I bought a package, but haven't tied with it yet. Nice ties. With a darker tail, it would be a good match for some of the tadpoles I see in the local waters. Maybe I should tie up a few with those colors and send them to my brother, since he's a Husky. He'd probably get a kick out of it.