I'm not 100% sure so I'll list of reasons that are possible.

First I'm a painter so you would think as an artist I would appreciate the art of tattoos, but the opposite is true, I find human body to be perfect as it is and tattoos take away from it's primal state. If the tattoo is a statement then it has imprinted a concept on what would be an open book, limiting the changing dynamic form of human biology into a trivial idea of the mind's ego.

Second maybe it's purely my own prejudice in the social situations I grew up in. Tattoos are for working class, whores and enlisted soldiers. I know this isn't true but it's hard to shake the stigma. I accept if this makes me a bigot.

Third I'm actually part Samoan so traditional tattoos don't even seem like tattoos to me, this is a much more complex issue relating to modernity's relationship to nature. Tattoos are visions from the artists eye and most artists live in urban environments which have an unsettled aspect to them, so even a 'peace sign' tattoo with good intentions contains an aspect of conflict. I expect until modern culture has used every natural resource we won't return to a harmonized lifestyle that traditional tattoos still retain the essence of, so for people not from these cultures it seems forced or concept based, if it is a reflection of their environment it's an unnatural environment. I'm not writing off modern culture, I think the best parts are expressed as pure ideals, so going minimalist with no tattoos best represents this. White people could return to celtic designs but again thats not the world we live in now so it still seems forced. (not sure I represented this idea well)

Forth I think it speaks to the character of a person. Sexual preference does relate to who you want to have children with. The decision not to get a tattoo signals to me that they have forethought and aren't impulsive, good qualities in a parent. I know this is another generalization but I can't help it. Desire is like superstition.