What religious/spiritual significance...

What religious/spiritual significance does the piercing of the cartilage on one’s ear have. It is a question that a friend asked me, and I have not been as successful as I would like in getting a definitive answer (or answers). So far, I have found that in Jewish society, it indicated slavery. Any other meanings?

-Deuteronomy 15:16-17, NIV translation (there is a similar passage in Exodus 21:5-6)

Is this the custom you’re talking about?

It should be noted this ear piercing was done only to a person who voluntarily remained in slavery after his term was over.

Zev Steinhardt

I am looking for customs other than what would be found in the OT. I am aware of the OT references, so maybe I should rephrase. Are there any other religions other than the Judeo-Christian faiths that even mention piercing the cartilage on one’s ear ?