How to prevent false testimonies

The main problem in the judical system is that people can lie.

We are trying to prevent the system by making them all swear an oath to speak the truth with the hand on the heart or on the Bible. But it doesn't work. People find it easy to go against the conscience and lie in front of their god. I just read that this hand on the Bible or over the heart tradition comes from an old hebrew tradition. The only difference is that in the hebrew tradition you place your hand over your testicles when you swear the oath. In other words, you're betting your nuts. If you lie, you get castrated.

Now, I think we should revive this old hebrew tradition. I mean really, have you ever seen a guy to swear over his nuts? Usually they swear over their soul or their grandmother's grave, their honor or some other disposable idea or item. Swearing over your family jewels is just hardcore. So hardcore that the Christians replaced the testicles with a less holy item; the Bible.

You just can't lie if you just bet your dear testicles. Of course, the problem is that women don't have testicles. Nothing seems holy to women. I don't know, maybe they could swear over their husband's wallet? If they're single, then well... The fridge, maybe?