1 Corinthians 6:19-20
Do you not know that your body is a temple of the Holy Spirit, who is in you, whom you have received from God? You are not your own; you were bought at a price. Therefore honor God with your body.
I wouldn't go putting ink upon the wall of the temple (the skin). If we were to put ink on any other wall, wouldn't that be classed as graffiti?
The fact is our bodies do not belong to us, they belong to Christ who bought them with his own blood. You do not have permission to go any put this stamp on your body.
Are you honouring God by doing this or dishonouring him? Let's think about it. If I were to sculpt a statue and someone came and painted on it, I would be very angry and disappointed. My hard work, dedication and care, ruined because someone else thought their "artwork" was better. Do you think your "artwork" is better than Gods? Isn't what God makes good? Can man improve God's design? No, so leave your body how God intended it to be. This goes for piercing and dying of the hair too. God has made us the way he wanted us to be.
Genesis 1:31
God saw all that he had made, and it was very good.
Psalm 139:13
For you created my inmost being; you knit me together in my mother's womb.
I don't want to offend God by putting a tattoo over his design. I will simply thank God for designing me with good health and a nice body.