TetherSpout wrote:In the top two photos it looks like a clear fluid is spurting out like a tiny fountain after the needle is withdrawn. I have seen this before. Does anyone know what this fluid is called?
I know you'd prefer a more technical explanation. This liquid is called interstial fluid.
Here's a video that explains in detail what that's all about: http://study.com/academy/lesson/interstitial-fluid-definition-pressure-composition.html
I've posted a few videos on my Tumblr blog showing my interstial fluid (I enjoy ball needling, BTW...) : http://devodick.tumblr.com/search/devodick%2C+ball+needling
It tastes like salty water, for the most part.
How much of it is there and what would happen if you drained all of it?
The video answers this question. If I put a hypodermic needle in my testicle, it can drip out for a long time. I've never had an occasion where it spurts out, like in the example you attached. Some guys tell me they never get any fluid when ball needling. It depends on age, and where you're putting the needles, I suppose. Most of my fluid drips out nearer the bottom of my testicles.