"Tattoos and Piercings May Advertise Good Health"

 copyright katgiraffe

"Tat­toos and body pierc­ings—com­mon world­wide since an­cient times—may ex­ist be­cause they ef­fec­tively ad­ver­tise ro­bust health and good genes to po­ten­tial mates, a study pro­poses"

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 from: scienceoxfordonline

(click on lady with piercing)