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.
Well, given that they (at least here) do jab you with a needle during a vasectomy in order to apply local anesthetic yeah it's pretty close. Didn't hurt all that much though and the pain was pretty quick.
The worst pain of the vasectomy is getting sacked right on the clips afterwards.
A lot of organs are the same, the nerves that detect pain are on the surface of the organ and they are mostly detect changes in external and internal pressure, but there isn't a lot of nocioceptive nerve action inside the structure.