Any injection of fluid into the body should be done in a prescribed manner, unless you are conducting sanctioned ethical research.
Sample:
Objective—To evaluate the effect of intratesticular administration of lidocaine on cardiovascular responses and cremaster muscle tension during castration of isoflurane-anesthetized stallions
http://avmajournals.avma.org/doi/abs/10 ... r.67.3.403
or such as:
Titre du document / Document title
Evaluation of single intratesticular injection of calcium chloride for nonsurgical sterilization in adult albino rats
http://cat.inist.fr/?aModele=afficheN&cpsidt=17547421
What these research scientists are doing, if it were done to humans, would be something that Nazi Hitler might have done. That they are doing it to rats seems almost macab. They get paid to torture animals. All in the name of research.
I guess if you are interested in having chemicals shot up your nuts contact some of these research labs and volunteer to be their guinea pig. Not that they could officially conduct some of these tests on humans officially or legally, but in the pursuit of knowledge some of them might just be willing to conduct unofficial research.
Don't believe what you read on the internet.
There are some people out there with twisted minds who try and bait people into doing things.
Rememer the sickos who use to put poison into aspirin caplets (Years ago).
People died, and they got their jollies from seeing innocent people die.
Yuck.
Well there are still sickos out there and they will claim, very convincingly, that they did this or did that and got positive results with no harm. They do this knowing that some sucker will take the bait and try doing it, and ultimately harm or kill themselves.
Surely you must realize that everyone who posts information on this site is not an expert, not a professional, may not have personal experience with something, and might just be a faker, liar, or sicko.
Eventually in life you need to trust in somethings and someone. It's a risk we must take.
Be very very very cautious about who and what you believe and the risks you take.