This isn't the strangest thing I've seen for sale on Amazon this month (that honor goes to "My Day by Jones," a short story retelling the 1979 film ALIEN from the point of view of the cat.) This set of "retractable vampire fangs" is right up there, though.
cosplay has put these kinds of products in greater demand than ever before.
It started off simple enough back in the 1960s with those dimestore plastic fangs and, for a while, that was good enough for most people. A few years back, though, artists (a group that actually included a few dentists) began to create vampire fangs that not only looked real, but were customized to match the color of your teeth. Before long, costume companies took notice and began looking for a way to produce these for a general audience.
Which brings us to the retractable vampire fangs you see above. Looking at the image, I'm not even sure how these work ... the hinge at the base appears to hide the fangs under your upper lip, but the whole apparatus reminds me of that kind of SAW-esque torture devices used to take x-rays of your teeth. And I've got a gag reflex worthy of a Monty Python sketch.