What is the most cliched tattoo you can think of? Chinese characters? A tribal armband?
How about a Celtic knot? Those interlocking lines that look like ropes or basket weaving.
Last week I was in Ireland and decided to investigate the roots of this trend.
I spoke with Kevin McNamara at the Dublin Ink tattoo parlor.
"It would be a weird week in the shop if I didn't do at least, like 40," he told me. "That's not a literal number, but yeah, it's nuts."
Without Celtic knots and shamrocks, McNamara said, he would never have learned how to tattoo.