Actually the piercing of a ball by a needle is not all that difficult or painful. They do medical biopsies all the time. The only pain was going through the scrotal skin and the pressure getting through the outer layer of membrane protecting the testicle.

I have done it personally and don't reccommend it because of the infection risks. Once the needle enters the ball there is no sensation. Everything has to be sterile. If the needle goes all the way through andis touched on the other side it is no longer sterile and you risk an infection pulling it back through the ball. So be very, very careful.

After you have done it and find it is rather simple to do and not painful, I have no desire to risk it again.