This is a pictures we received many years ago. There wasn't an explanation to why this man got the tattoo, so recently we contacted him and asked him why.
We were happily greeted. He told us he had the tattoo done while living in the states. There it was a contention and a conversation starter. Later he moved away from the states and the tattoo then has been living a dormant life. His own explanation as to why his symbol of atheism went from contention to "just a tattoo" is that the countries he's been living in has no religious hang ups.