I have a friend who in his late-teens was going out with a girl named Katie. He was head over heels and he got her name tattooed across his back. When the inevitable breakup happened the following year, he had the tattoo removed.
A couple of years later he married a girl called Katie and decided to get the same design tattooed on his shoulder. 5 years later he got divorced and he had the tattoo removed.
The last time I saw him was in a bar in Leeds a couple of years ago. He told me that he'd been seeing a girl for 4 months - Katie - and that he was having her name tattooed on his forearm.
According to Facebook he is currently single. Some people never learn.