My wife absolutely loves to beat my balls and I 100% love it! I highly recommend it, especially if it is something she has expressed that she wants.
Be prepared for her to start off light and increase the pain as she tests your limit. She will want to go farther than you are prepared to go, but if you can take it she will be so much more happy and enjoy herself a lot more.
Some couples have a safe word. If you think you need one you should bring it up before things get started. I have never used one and have always encouraged my wife to do anything to my balls that she feels inspired to do.
CBT was also part of our role-play.
Like you, we hadn't a safe word.
My wife kept asking me if she should stop.
My answer was always no.
Or she would ask me if it could be even more painful.
My answer then was always yes.
But she felt exactly where the limit was and stopped immediately to kiss me deeply.
She preferred to hurt my penis but especially my glans with a ride crop.
My glans and my balls were her main targets.
Sometimes she would wet the end of leather beforehand through and through to make it even more painful.
When the pain became unbearable she stopped but not without a final very hard slap.
‘Surely I must see some result’ she would say.
She could be very mean and expressed this by always trying something else.
Although she never tied me up, I always had to pretend this was the case.
My wife thoroughly enjoyed this role-playing game. So did I, for that matter.
After one such session, she was the loving and tender wife to her husband.
Much more explicitly than usual.
This gave me the satisfaction of having been able to give her this pleasure.