knit tattoo, purl tattoo

i've thought about getting a tattoo once or twice in my life. i don't know if i ever could though. i'd worry about where how the skin would age. i'm also so incredibly anal that if it were in color i'd probably end up coordinating my clothes to go with it - that just wouldn't be healthy. i'd never thought about knitting tattoo's though. not that seeing them makes me want to get one now but i thought they were interesting nonetheless....