Yeah, severed heads are nothing new in American pop culture. How do you know that this wasn't a homage to EC comic books of the 1950s? Or Breaking Bad? Maybe they are trying to appeal to Mexican drug traffickers? This can be read in multiple ways, or maybe there is nothing to be read. But if you're going to explore one reading, why not push it further?
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I think she's hot, hot, hot and that gives her vagina tattoo bonus points. The cat-nose-and-whiskers, though, makes me wonder. That doesn't seem like a smart tattoo at all.

-- Rear Admiral