The rainbow has been around longer as a symbol than even this one.

They took it and reattributed it to sodomy.

It isn't a stretch to say they did the same thing here, but I think it is far deeper than simple reattribution.

Really, take a look at the caduceus.

What does it look like?

Maybe a syringe?

You've got the needle, a shaft composed of the serpents, a plunger at the top, and tabs (wings) to hold your fingers against. The liquid is the venom of the serpents. Also, it didn't always have wings.

Too many coincidences for my liking.

How did they know? I don't know for sure, but I have my theories...

Plungers existed before syringes, so they could have had a concept of it in medicine to remove things like pus and fluids from lanced boils an the like. Those who believed in balancing humors would have understood the need for a way to draw fluids. Predating even medicine, some bamboo fountains used the same concept to draw water upwards into the tube.

All they had to do was wait to minimize the technology. They had an apt role model for the administration of liquids into the body with the serpent, whose fangs are ducted, so it isn't that far of a revelation for them to theorize a syringe especially since things like therapeutic acupuncture goes so far back in history.

The rainbow has been around longer as a symbol than even this one.

They took it and reattributed it to sodomy.

It isn't a stretch to say they did the same thing here, but I think it is far deeper than simple reattribution.

Really, take a look at the caduceus.

What does it look like?

Maybe a syringe?

You've got the needle, a shaft composed of the serpents, a plunger at the top, and tabs to hold your fingers against. The liquid is the venom of the serpents. Also, it didn't always have wings.

Too many coincidences for my liking.

How did they know? I don't know for sure, but I have my theories...

Plungers existed before syringes, so they could have had a concept of it in medicine to remove things like pus and fluids from lanced boils an the like. Those who believed in balancing humors would have understood the need for a way to draw fluids. Predating even medicine, some bamboo fountains used the same concept to draw water upwards into the tube.

All they had to do was wait to minimize the technology. They had an apt role model for the administration of liquids into the body with the serpent, whose fangs are ducted, so it isn't that far of a revelation for them to theorize a syringe especially since things like therapeutic acupuncture goes so far back in history.