So, for anyone that’s curious, testicles are weird pain wise. They have a lot of pressure sensitive nerves on the surface of the testicles themselves. But if you, for example, were to hypothetically push a needle like object into the center of a testicle. You would feel the pressure of the needle pushing on the testicle, but once it pops through there is very little sensation at all.

Edit: Even though this is true this is NOT medical advice. Do not do this as it could have potentially serious consequences. I feel like I shouldn’t have to say this, but here we are.