Is it true that tattooing could be used as a fashion statement, but shouldn't be used as a sign for saying something? For example homosexuals pierce their right ear.
No, this is not true. The Holy Bible tells us that God forbade tattooing and body piercing without giving exceptions. Tattoos and body cutting were a way of mourning for the dead. God commanded His people not to make cuts or prints in their flesh for the dead "do not tattoo yourselves or cut gashes in your body to mourn the dead" (Lev 19:28). "You are the children of the LORD your God; you shall not cut yourselves nor shave the front of your head for the dead" (Deut 14:1).
The heathen did these things to pacify the infernal deities they dreamt about and to render them favorable to their deceased friends. The people of God must not receive the image and superscription of these worthless deities. Such practices were signs of rebellion against God.
If God prohibited these rituals for mourning, do you think He would allow it for fashion!