I would swear I remember a prohibition against marking your bodies like the pagans do somewhere in the Bible but for the life of me I cant find it. Are you familiar with it?
Leviticus 19:28 says,
“Do not cut your bodies for the dead or put tattoo marks on yourselves. I am the LORD.”
Lots of people will say, “That’s in the Old Testament. We’re not under the Law” It’s true, but in Ephesians 2:10 God calls us His workmanship (handiwork, work of art). Most people wouldn’t go around defacing a human being’s art work. Why do we think it’s OK to deface the Lord’s?