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Found one more..
http://www.mangago.zone/read-manga/piercing_hole/
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You're welcome
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Ah, I don't have this one, his boyfriend would be mad jealous - we have just been best friends for as long as I can remember ...
BTW not all piercings are sexy - before you click, brace yourself - you have been warned ... http://www.telegraph.co.uk/news/newstopics/howaboutthat/6436327/Retired-bank-manager-sets-record-for-most-body-piercings.html
Does anyone know of a yaoi where a character has a prince albert ring?