Goes back to the whole amateur/professional thing I guess.
I have no tattoos, however, I have friends that have many; I'd never heard it called anything but a tattoo gun until very recently.
Also until recently, I thought it was common knowledge.
"People who harbor strong convictions without evidence belong at the margins of our societies, not in our halls of power. The only thing we should respect in a personís faith is his desire for a better life in this world; we need never have respected his certainty that one awaits him in the next."
- Sam Harris