Rubystars, the verse you quoted especifically refers to sexual promiscuity with prostitutes. Whether one is Christian and takes it for a holy word or one is not Christian and so does not believe in the NT, that words show a great wisdom. For he that has sex with a prostitute becomes one flesh with her. Many men despises prostitutes and perhaps would not even befriend them in public on the other hand, they don't care about becoming spiritually one being with them. It's hypocrisy!
However, the motivation to get a tattoo, not a tattoo itself, sometimes expresses inner uncosnciuos craving foir frivolity and many other confused feelings ( true in my case). Therefore it's not very compatible with the Christian idea of the Holy Ghost dwelling in one's body. And for a non-Christian Gentile, perhaps, it's not advisable either. But strictly hallachically speaking, according to Judaism, tattoos are permitted to Gentiles.