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serotonin, popularly thought to be a contributor to feeling happy.
done by levi at skeleton key tattoo in portland oregon.
submitted by http://heated-spaghetti.tumblr.com

serotonin, popularly thought to be a contributor to feeling happy.

done by levi at skeleton key tattoo in portland oregon.

submitted by http://heated-spaghetti.tumblr.com

#submission #tattoo #geek #science

serotonin, popularly thought to be a contributor to feeling happy.

done by levi at skeleton key tattoo in portland oregon.

submitted by http://heated-spaghetti.tumblr.com

#submission #tattoo #geek #science

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